Something Else Posted October 3, 2021 Share Posted October 3, 2021 Setup:55 Gal, 0 amonia/nitrite, ~60 ppm nitrite before water change, 74°F, PH 7.5 KH 40 GH 160. HOB Aquaclear 70 and 2 air stones for circulation. No CO2, planted, led light, using thrive all in one 2 times a week (ez green was put of stock), and Aquarium co op root tabs in substrate. AAA potassium sulfate ~10 ppm weekly tank mates: 8 black phantom tetra,6 rosy barbs, 7 zebra danio, 1 moor goldfish, 3 ivory snails . Typical Schedule: Sunday remove 50% water (EI dosing plants), add seachem prime, sometimes add excel, then refill tank after a few hours I add potassium sulfate ~ 10 ppm Recent Schedule: last 2 months I have not been on schedule, and have been doing water changes ~ every 2 weeks instead, however I did them the same way as explained above. Last week I noticed nitrates accumulating, I missed the Sunday September 26 water change, so I decided to do a water change as I typically do on Tuesday September 28, then planned to get back to my regular weekly changes. Problem: Today, did a water change as I usually do and came back to 4 dead fish and the rest are barely able to swim. I don't think it's due to .....PH as the tap and tank were both ~7.5. The temp I added to the tank was slightly cooler and brought the temp down to about 69°F, but that's not unusual. I used prime de-chlorinator before adding fresh water. Fish didn't seem to show signs of stress before the water change... About Me: I tend to feed heavier I feed once a day about 6 days a week. I let the flakes hit bottom for snails and bottoms feeders in all tanks. I own two 55 gals, one 20 Gal and three 10 gallons, I only had this problem with only this one tank, but my schedule and water change habits and fertilizer habits are the same for all tanks. Any idea what happened? I honestly don't feel like I can keep up with this hobby anymore, every time I think I know what I'm doing I kill another batch of fish 😮💨 Link to comment Share on other sites More sharing options...
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