I had noticed for a few days that there seemed to be a lot of waste in the
gravel. Today I had a closer look at the UGF & noticed that the up-doodad
had come loose. I reattached it, used the gravel vac & topped up the water.
I think I'll use the gravel vac daily for a week to clear the waste. The
level of nitrates is virtually at zero, but I'm now worried that the cycle
has been disrupted & that there might be a lot of ammonia in the tank. I've
ordered a test kit, but it might take a week to arrive. Is it necessary to
restart the cycling process? What is the best way to do this with 6 fish in
the aquarium?