acidburn470 said:Is it safe to add substrate to an aquarium that is allready established?
substrate is purly optional!!! it should if any used be placed before the water but still be add later wash well like for mentioned...acidburn470 said:Is it safe to add substrate to an aquarium that is allready established?

good tipsbluedempsey said:i would atleast rinse it first
so it doesn't cloud the whole tank