petertr
Fish Addict
Called in to my lfs today to pick up some pellets for my catfish and was having chat to the owner and he mentioned that because i changed from gravel to sand that it might have caused an ammonia spike because i removed the good stuff when getting rid of the gravel
He seems to know what he is talken about but thought i would ask here anyways
Very very unlikely.
The bacteria in the gravel will probably be less than 5% of that in the filter.