I asked the age for the reason stated above.. New tanks go through stages and the diatom algae is just part of the aging process. Do not run out and buy lots of crabs and snails, they may end up dying because there is not enough food when the diatom is gone. Read up on tank cycle and acclimation. Improper acclimation is a sure fire way to kill fish and inverts.. Tank things SLOW and read, read and read more bofroe rushing into anything.
Ask questions here and don't take what the LFS
says as being correct..