Flash Posted December 11, 2020 Share Posted December 11, 2020 (edited) I hadnt water vac in a while noticed alot of debree 27liter tank did 10liter water vac change my nitrites spiked after water change after 2 hours checked it up again and did another smaller water change and tested 2 hours later nothing has changed it is a cycled tank. What do i do? Edited December 11, 2020 by Flash Link to comment Share on other sites More sharing options...
FrozenFins Posted December 11, 2020 Share Posted December 11, 2020 How big was your water changes? what are your nitries at? Link to comment Share on other sites More sharing options...
Brian H Posted December 11, 2020 Share Posted December 11, 2020 I had a similar situation after I gravel vacced my well established tank and the conclusion I came to was that I had disturbed the fertilizer tabs (not from the Co-Op) I had placed in the substrate and released ammonia/nitrite into the water column. It was briefly at 10ppm and I had to do 50% water changes for a few days in a row before the I was able to get out in front of it. Had a bacterial bloom as well which I assume was the tank trying to also deal with the excess nitrites. Haven't used the gravel vac since and actually added additional fert tabs but no subsequent spike. Link to comment Share on other sites More sharing options...
Flash Posted December 11, 2020 Author Share Posted December 11, 2020 The test before this test was pretty normal. Because im going away i thought if i lowered the nitrates a little it would cover me till i got back just raising a kittle Link to comment Share on other sites More sharing options...
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