01-27-2012, 02:46 PM
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A quick side note about generic sponge filters...
Initially I used ALL air filters on everything but my 110g. my smaller tanks and breeding tanks had lee's air powered box filters, but I used a sponge filter on my 10g sword breeder, my 55g and my 20 long. The 10g filter never had an issue, and the nice hydro-sponge pro IV was flawless. The problem was the cheap smaller one I used on my 20 long. It had an integral diffuser at the base which eliminated the need for an air stone, however being a well stocked planted tank I was and am from time to time fighting diatom build up. The diatoms would collect in the diffuser and partially block the air flow, causing the air to bubble up from around the base. The only solution was to physically remove, disassemble, and clean the diffuser every 1 or 2 days! not even glue would stop the air leak!
it was a headache to say the least. If you arent going to get a hydro-sponge, I would recommend doing your homework on the specific one you wish to purchase to make sure it can be used with a traditional air stone, but thats just my $0.02