Have been having some mysterious deaths. Marginatus wrasse in January, 2xiridis wrasse and my lennardi in February. Same symptoms, looks 100% healthy the one day, next day they start developing what looks like white abrasions on side, and a day or 2 after that dead. What they all have in common is that they are sand sleeping wrasses (although I have a few more of those that haven’t had problems yet). Nothing that doesn’t sleep in sand has developed any markings like that, with only the new tennenti and my puffer showing white spot as only other disease I can see. At a bit of a loss, have some suspicions, but no idea exactly what is causing it. Anyone ever experienced this before?
So far what I think options are:
Sand living worm targeting them at night
Magnifica nenny stinging them
Sandbed a little too deep on left hand side causing sulfur build up or some bacterial disease to thrive in sand
Not sure what else can cause this?
Geez wrasses usually tough as nails, my Iridis has survived every calamity my tank has ever experienced, even jumped out the tank and got chewed by the dog so bad his intestines were exposed and had a dog tooth hole in his head. Survived that as well.
Can only be something in the sand, maybe take a plastic rod or fork and stir up the sand and see if anything pops up.
Still losing sand sleeping wrasses, latest victim the blue spotted Anampses. Black leopard wrasses are spawning, and they also sleep in sand, so must be some sort of predator. Found a bit brittle starfish in tank (about hand size with legs), and sumped it, need to eliminate possible options. The rest of the fish are doing well, the truncatus bristletooth from KZN is starting to turn adult, literally went from all yellow to having spots on its head overnight:
Redid the LED’s on the weekend, the old lenses were beginning to rust. Also changed out the drivers so that I have a 20w driver on left, 30w driver in middle, and kept 100w driver on the right for the magnifica nenny. Strange that you can’t even see the difference in intensity visually, but differences in par must be big.
Old lenses needed replacing:
New lenses more plastic with a seal, hopefully lasts longer:
Also added some extra fans to keep tank cool, plus space for drivers: