Now that I'm down to four Red Spot Cardinals I've noticed that they no longer shoal together. Two of them hang together in the back left-hand corner of the tank, the third swims alone in the back right-hand corner and the fourth, the smallest one, swims right out at the front of the tank. I must admit I do miss seeing them all together.
As for the Nudus gobies I've not got a clue what they are up to any more. They used to be out all day long but now they are mainly hidden underground doing goodness knows what. I wish I had X-ray vision so that I could see what they are doing. They are using the pistol shrimp's burrows; are they interacting with him at all? I would be nice to think that one day they might pair up but I can't see it happening at the moment
Will, the blue-legged hermit crab shed his exoskeleton this week which reminded me that it'd been a while since I added any new shells. As soon as I dropped in some larger accommodation he marched up to the nearest one, whipped his naked bum out of his old shell and moved into the new one. Has he no shame, lol! Here he is showing off his bright white new shell soon to be covered in coralline no doubt.
I noted in my June update that the Plexaurella sp. gorgonian had a damaged area on one of its branches. Well, a couple of days following that two more small damaged areas appeared and this time the gorgonin inside was exposed. The polyps then retracted completely. I waited for a week in the hope that it would miraculously recover but the polyps remained hidden and a layer of algae began to cover the branches. I decided then to take action and move the Plexaurella to a different area of the tank, if I left it where it was it would be a goner in no time at all. Finding a new location proved somewhat tricky as real estate in the tank is limited these days (ahem, what did I say about not over stocking my tank with corals!). In the end I decided to fix it close to where Acro #2 used to reside, it's not really an ideal spot long term, especially if the tiny remaining base of Acro #2 survives and sprouts new branches, but that's a problem for another day. Anyway I doubted that the gorgonian was going to make it but it appears I might be wrong. The following morning the polyps began to extend again and now 3 days later they are almost all back out again, it's not back to its previous fluffy glory but compared to how it looked before moving it's amazing. So was it a flow issue or a lighting issue? Or was the Seriatopora hystrix to blame, it was directly down flow of the Seri, maybe that was releasing some noxious substance that the gorgonian didn't like. Now I need to wait and see if the damaged areas can be recovered.
I went away this weekend and managed to find the time to visit a few not so local fish shops (as the reef-obsessed tend to do given the opportunity). In the 3rd shop I struck gold and located the Porcelain crab (Petrolisthes galathinus) I've been searching for since I first set the tank up. She is one of the hitchhiking species that are sometimes found in live rock. I used to have one of these peaceful filter feeding crabs in my old tank and knew I wanted one for this tank too. When I arrived back home everything in the tank seemed fine and my crab (a female according to the shape of her abdomen) was duly acclimated and introduced just before the lights went out.
This morning I eagerly rushed down to check on my new crab only to discover that the curse of the Red Spot Cardinalfish had struck again. Another one of them had died, this time I discovered the body, the Lobophyllia was trying its best to eat it! The meal turned to be too much for the small coral to stomach and I was able to remove the dead fish using a pair of tongs. It was at this time that I happened to notice a small shape lying on the carpet to the side of the tank. Closer inspection showed it to be Gordon my Whitecap goby, nooooooo! He had jumped out of the tank at sometime during the night. I do have a mesh lid on the top to prevent any jumpers but somehow he still managed to find a way out, he was a very small fish after all. There is no doubt in my mind that he jumped as a direct result of the persecution by the Nudus gobies. The female in particular went out of her way to terrorise him at every opportunity. I have no idea what will happen to Al the pistol shrimp now and I dare not introduce another Whitecap as the same thing could happen all over again. He's going to have to make do on his own from now on and I expect I won't see him nearly as much as when Gordon acted as lookout for him. I feel so very, very sad today.
On the 18th April I relocated Charlie (or is it Charlize?) the hitchhiking crab from the DT to the refugium. After almost 4 weeks of no-show, today I discovered him (her?) alive and well in the jungle. I am chuffed, what a survivor!
Also I've also been playing around with a new macro lens, starting with some of the easier corals to capture.
Never in a million years did I think that it'd be easy to catch and remove my hitchhiking crab but boy how very wrong I was. My deluxe homemade crab trap actually worked first time! I propped an empty glass spice jar up against the top rock where the crab lived and baited it with some mysis shrimp just after lights out. I honestly felt that the jar was a little too tall for the job and it would never catch anything but to my very great surprise it did. I checked back on the tank after just an hour and was gobsmacked to discover the crab sitting in the jar. It's so great when a plan comes together without any blood being shed (and doesn't cost anything, lol).
With clearer photos I'm now confident that the crab is indeed Chlorodiella nigra. Please refer to the link below for comparitive purposes.
Of course I couldn't bring myself to kill the little guy, after all he had done no wrong, simply knocked a frag off the rock which was probably my fault for not fixing it down securely enough. The biggest issue for me was the fact that he'd set up home right next to my clam and whilst this species is reported to mainly eat algae I didn't want to take the risk of the clam being irritated or even worse becoming a crabby snack down the line. So off he went into the refugium where hopefully he'll be content with an endless supply of algae (and pods?) to munch on.
After waiting absolutely ages for delivery I was finally able to set up my shiny new GHL Profilux 4 controller over Easter. The hope is that when the time comes I can monitor the tank whilst I'm away, so less worry for me. At the moment I just have it set up with four probes measuring temperature, pH, redox and conductivity.
There is just 0.1 degree Celsius difference in temperature readings between the digital GHL probe and the Simplyaquaria temperature controller which is pretty good going considering the price difference between the two. I am going to keep the Simplyaquaria controller running as a backup to the GHL, two alarms are better than one in my books. I may actually move the Simplyaquaria probe to the DT so that I have two separate temperature readings to compare.
The conductivity of the tank water measured by the GHL probe was 51.8mS which converts to a specific gravity of 1.0257. My calibrated refractometer measured it to be 1.026, again the values are pretty close which is good. I am happy to know that I've been maintaining a suitable salinity using the refractometer.
I never bothered to purchase a pH test kit this time round so I had no idea what the actual pH readings were going to be. The levels are fluctuating between 8-8.2 or thereabouts, I would like to study the whole 24hr cycle but haven't managed to work out how to access data from the Profilux yet (if indeed it's actually possible to do).
The redox probe is still bedding in, to be honest I'm not really sure what to expect from the readings as I've never used one before. It came with the set so I thought it'd be interesting to set it up and investigate what it can tell me about the tank.
On the livestock front, Charlie the hitchhiking hermit crab is now on borrowed time after his first tank misdemeanor yesterday. He knocked my prize Acropora gomezi frag off the rock in his quest for food. I supposed I should be pleased that he just wanted to graze off the rocks and not eat the coral but still it's annoying. He's really quite big now so I'm sure that he'll cause more trouble in the future if I don't try and catch him now.
I think the T. nudus gobies have spawned again, Hop has been sequestered in the cave for the last two days and Skip won't let him out to feed, so I'm hopeful that there are eggs hidden inside. I hope I actually get to see some fry this time round, pretty please! The Cardinals also appear to be courting but there's been no further release of eggs.
My hitchhiking crab has been getting bolder and I've finally managed to snap a few photos of him. Charlie is much bigger now, at least 2 times larger than when I first spotted him or maybe even 3 times now! When I say 'him' I may be incorrect, in reality 'he' may be a 'she', so a Charlize as opposed to a Charles. Female crabs have a wide abdomen and males have a narrow one. In Charlie's case it looks sort of in between, an immature female perhaps?
This tank is approaching the 6 month mark (on the 16th April). Wow, where has the time gone to? It's now well and truly in the 'spotty phase', the back glass is covered with spots of coralline algae and spirobid worms. I have scraped it once already and am now in two minds if I should do it again. Does it look natural or does it just make the tank look messy? I can't decide, answers on a postcard please. :o)
I've had to move the Lobophyllia yet again. The Lobo was very happy in its last spot but, darn it, the snails (Mr Conch I'm looking at you particularly!) just kept knocking it over no matter how hard I pushed it in to the sand. So now I've glued the base of the skeleton to the rock work on the right-hand side at the back. It's not great for viewing but at least it won't get damaged there. Fingers crossed that's the last time I have to move it!
Acropora sp. #2 still appears to be red bug free and the PE looks good. Acropora sp. #3 is on the mend I think, to my eye there appear to be less blistering now. It's not completely out of the woods yet but I'm feeling a little more confident about its future. General coral colouration is not great but I'm not too concerned about that at this point.
My mysterious hitchhiking crab has thankfully moved away from the S. hystrix and has set up home in the uppermost right hand rock. I still don't have a decent picture of him to show I'm afraid, he moves like lightning whenever I get close. So far he's not attacked or eaten anything that he shouldn't, I regularly observe him scraping at the rock work with his spoon shaped claws and he does a great job of keeping that area clean of algae and detritus. He has grown considerably and I am probably not helping matters by occasionally feeding him directly. I have tentatively identified him as Chlorodiella nigra which is a member of the Xanthidae crab family. According to my research they are generally fine when smaller but can become troublesome as they grow and their appetite increases. I am investigating removal options just in case.....
Yesterday afternoon I introduced probably my last fishy additions for this tank, they are still settling in at the moment, pictures to follow hopefully later on in the week.
It's four months since this little tank was set up and all seems to be going really well. Almost a bit too well actually, I'm expecting something to go wrong at any moment, it's usually the way. I'm keeping a close eye on the water parameters now that I have added a few more corals. In the past I have really struggled to keep the alkalinity and calcium levels at appropriate levels even with the use of a calcium reactor and kalkstirrer. As soon as it was pumped in it was sucked up by the corals and clams. This time round I'm hoping to maintain good levels with careful dosing. The parameters today were:
The above were tested using a refractometer, Salifert test kits and a Hanna pocket checker for the phosphate. I'm fairly sure that my phosphate level is not really zero but it must be pretty low and there is very little in the way of nuisance algae growth in the tank apart from a bit of furriness on the rocks. I do not know what the furriness is but it doesn't look too unsightly and stays short. In any case there seems to be less of it now. The macro algae growth in the refugium has been disappointing to date, considering the lack of nutrients I suppose it's not entirely surprising. As long as the reason is not down to a lack of flow or lighting, time will tell, I can't imagine this situation will last for long. I've started dosing a small amount of Reef Roids and KZ Sponge Power recently so they may affect the levels in the future.
You'd think that over 4 months I'd de familiar with all the livestock in my tank, well no actually. A couple of days ago I noticed that the Seriatopora had retracted its polyps and on closer inspection I discovered a small crab sitting at it's base. Where on earth had he suddenly popped up from?? I highly doubt that he came in on any of the SPS frags as they are too small to conceal a crab, I suppose it could have hitched a ride in on the zoanthid rock but the most likely explanation was that it was hidden in the live rock when it was first added. It doesn't look like it's chowing down on coral flesh (at the moment, heh!) so I'll leave it be for the time being and watch and wait. I hope it behaves itself or we'll be having some fun and games with extrication later on.
Hi, my name is Lisa and I live in Derby, UK. I am a self-confessed reefaholic!