Ok so my fishless cycle was going well........I was dosing about 3ppm ammonia regularly and it was dropping to zero within about 12-24 hours. Nitrites were off the chart. Then all of a sudden nitrites were zero but whereas before I was seeing about 10-20ppm of nitrates these were also zero. Now the ammonia seems to be taking a lot longer to drop than before and I have no nitrites or nitrates. The pH is around 7.6 - the only thing I can think of is that I put in an anti algae product which removes phosphate which I've heard the bacteria actually need? Any ideas please, it's been about 6 weeks now, impatience is setting in! maybe I could add phosphate by adding fish food?
ps) using API test kit
ps) using API test kit