spoonman
Aquarium Advice Addict
I have PFS in 3 tanks right now. a 140, 115 and a 29. When I do my PWC's, I take my fingers or a net handle and stir up the sand a little to release any air pockets. Although in my cichlid tank the fish do that for me. Some people I know put a hair pick on the end of the python to stir up the sand when they do PWC's. Have been using PFS for about a year now with no issues. BTW, the 115 was gravel and I just put the fish (24 cichlids) and put them in a big tub with air pump, kept the filter media wet, drained the tank, took out the gravel, refilled with dechlored water and put the fish back in. Took about 3 hours but well worth it. Here are some before and after pics. Also with PFS you have to remember to keep the intakes for filters up from the sand so that you dont get the fine sand in the impeller.