RichNJ Posted September 14, 2022 Share Posted September 14, 2022 I have an established well maintained community planted 55g. Usually 8.2 ph, 25 nitrates/0 nitrites/0 ammonia/6dh hardness/40-80 KH ppm, almost no variation in water parameters for 6 months+. I had 4 midsize angelfish, 10 lemon tetra, 8 white skirt tetra, 15 cardinal tetras, 2 hillsteam loaches, 4 cory cats, 1 harlequin razborora, 1 zebra danio, 2 mollies, 2 nerites, 4 ammanos, and 2 mystery snails. Bladder snails here and there too. On 9/4 I added 5 cardinals (to make a nice little school), 5 harlequin razbora (so the other guy wasn't alone). I don't quarantine and buy from a reputable store that treats all stock. On 9/5 we did a scheduled simple water change (about 30% per my normal 1 or 2 times per month), didn't touch the filter or gravel vac, just water only. On 9/10, we lost a lemon tetra, but all else was okay. I figured he just gave out. Yesterday, on 9/13, we lost 3 cardinals and one hillstream loach. I tested the water, and all was normal per the above parameters, although slightly harder at 7dh, but not widely harder (maybe I had a bigger scoop of my normal equilibrium?). Today, 9/14, we lost another cardinal and one lemon tetra. Before all of these events, we haven't lost a single fish for months, so this is sudden for us. The biggest variables are the new fish from 9/4, especially since older fish died. No signs of ich on anyone and there are no signs of any fungus, spots, marks, etc. I am considering a course of ich-x since I have it in stock ready to go at home. Is my tank crashing or do we have some kind of other disease? All else looks good, but the only other thing I can think of is our grumpy make angel who chases everyone, but doesn't bite. Link to comment Share on other sites More sharing options...
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