Hello i have a big problem take care of a fish tank at a bkstore and added chemiclean a few days ago... well a local company came in and added some fish and took it upon themselves to add chemiclean as well... throwing the nitrate level sky hi.. i tried to look for ideas on the chemicleans website but they are under construction so i dont know what to do??? can anyone offer some advice... i was going to do a water change.. but other than that i dont know???