Good to see things are clearing up. I wouldn't stop feeding fish. If you are concerned about it then maybe reduce feeding to once a day?
Also, if you take your GFO off line be sure to check your phosphate reading regularly as you may find it climbing. BioPellets do not strip out phosphates all that well. They take out nitrate and phosphate in proportion to the "redfield ratio". In other words, lots of nitrate but not a as much phosphate. This is why a lot of people (myself included) run GFO in combination with bioPellets.
A few people do dose microbactor 7 with BioPellets but since you are currently having issues I would not add another variable. That is unless you are already dosing it :-). I have never dosed it myself so can't speak on its effectiveness (or lack of).
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