believe me, it will take care of itself. it just doesnt happen overnight! i just set up another tank in late july, and had the diatom bloom about a month ago, since then it has drastically reduced. i have narcissus snails and cerith snails and they keep the sandbed stirred up fairly well, the cerith snails will esp eat diatoms. do a search on here about diatoms or look in the archives and youll see that this is a regular occurence for new tanks, do not worry!