I have a 30 gallon tank which has decided to grow some algea.. I have an algea eater but he is on the dumber side and won't eat the algea (He'd rather eat fish food).. I don't know what to do, does the stuff you put in the tank actually work? Will it harm my fish? My mom said to take out the heater, but won't that harm my fish (Guppies and Platy's)? I've wiped it off the front 3 times in the last week!. If it was a nice green color I'd just let it grow but is a gross orangy yellowy color!