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Tap water can sometimes contain a high level of phosohate already. Whatever's causing your high phosphates, I doubt it's your gravel.

__________________
If you have a big enough tank with enough hiding places, pH of around 7, you can keep virtually any fish together as long as all the fish are around the same size and these two groups of fish are avioded:
Serrasalmus
Tetradon(figure eights and dwarfs are the
exception).

I keep a successful community of fish in a 4 foot tank including the following families:
Cichlids, tetras, loaches, gouramis, barbs, rainbows, livebearers, killiefish, catfish, puffers.

03-15-2006, 02:35 PM	#5
Cichlid Man Super moderator Join Date: Jan 2005 Posts: 2,095	Tap water can sometimes contain a high level of phosohate already. Whatever's causing your high phosphates, I doubt it's your gravel. __________________ If you have a big enough tank with enough hiding places, pH of around 7, you can keep virtually any fish together as long as all the fish are around the same size and these two groups of fish are avioded: Serrasalmus Tetradon(figure eights and dwarfs are the exception). I keep a successful community of fish in a 4 foot tank including the following families: Cichlids, tetras, loaches, gouramis, barbs, rainbows, livebearers, killiefish, catfish, puffers.