http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=aquarium-substrate#1 Hi! can i use sea sand in my Cichlids tank and would it have an effect on my Ph levels and fish. the sand is very fine. Shane 2011-07-19 http://forum.aqua-fish.net/?topic=aquarium-substrate#2 Sand is just fine, it won't affect pH. jan 2011-08-21