Hi there from South Florida. I have a nano cube 12 gallons that has been up a few months. I have been successful in keeping my corals alive but now all of a sudden my fish are dying off. It started with a small blue hippo tang (yes, now I know it was not a good pick for a small system, thank you LFS
!) that got some white spots that would come and go. He ended up dying after getting sucked into the filter...had been doing great before that. Now in the last two days I lost my two oldest fish, a true p. clown yesterday and just now a red scooter blenny. The only other fish I have is an orange/white goby which is a bit larger than the other gobies had been and a yellow watchman goby. I don't see any spots on either of them. The clown had some white stuff on it but had a huge appetite and had been trying to force himself on a bubble tip anemone that I had acquired. I did see him trying to cuddle up (probably scratch) with the coco worm and he tried to get in with my small frogspawn coral, too.
Other circumstances: The BTA does NOT like to be front and center and I have not yet seen it open all the way up. Usually I see it shriveled in the back stuck up underneath OR just in the backside of my live rock. He has not eaten anything other than the liquid coral food I give the other coral. He will hold onto the krill for awhile and then lets it go. He opens up regularly but I have not yet seen all his bubbles open. He just usually has part of them open.
I have a flaming scallop that pretty much keeps to itself, a sand sifting star, some blue leg hermits, two decorator crabs and various snails.
The corals: trumpet or candy cane coral, flowerpot,small frogspawn, grogorian (spelling), brown xenia, various mushrooms/polyps and one toadstool. I have a coco worm and a regular feather duster.
I am beginning to wonder if I have a killer in my tank. About two months ago I bought a small sebae anenome that didn't make it and also a small sand sifting goby of some sort that worked real hard the first night I had it but has disappeared since then. I have looked all around the tank, in the filters, etc., and no sign of him at all. My nitrates are tested regularly and have no problems with that either, so not sure where his remains could be. Since then everything had been rather stable until losing the clown yesterdayand the red blenny today.
I have done the the following tests and all came up within normal range:
Salinity, calcium, phosphate, ph, nitrates, alkalinity.
Tomorrow I will take a water sample into the pet store for further tests but wondered if anyone can see anything that may be obvious to you?
Thanks all....looking forward to hearing your words of wisdom. It's so sad to lose fish and see all the levels fine and not have any clue what is going on.