Opie3001 Posted December 12, 2021 Share Posted December 12, 2021 (edited) I lost 9 fish in one night and I am not sure what I did wrong. I had a fish with one Redeye Tetra pop eye. So I added some API Melafix and API Stress Coat+ and API Aquarium Salt. All meds per the box but I was light on the salt part. One tablespoon per 7 gallons. The box says one per 5 gallons Did that early in the day. I watched them all day and everyone seemed ok. I was more worried about all the snails and plants but not the fish. This is stuff I have done before. Well this morning I found 9 dead fishy's. My two Danios, two Siamese algae eaters, two pink tetras and rest were smaller tetras. I have no clue what I did wrong. These fish have been in this tank for 3 to 4 years. The tank is heavily planted looks like a jungle. Tested the water yesterday and again this morning when I found them nothing wrong. Plants look great even the snails all seem on and look good. So I took out the bodys and did a huge close to a 100% water change and now I am waiting. Oh by the way the red eye tetra with the pop eye is still alive and seems ok so far. There are about 20 other fish in the 75 gal tank. Water Parameters: pH = 7.2 Nitrates = 10 or less Hardness = 150 ppm Nitrite = 0 Ammonia = 0 KH/Buffer = 120 ppm Water Temperature = 77 Edited December 12, 2021 by Opie3001 Link to comment Share on other sites More sharing options...
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