i have a ten gallon tank divided in two for my two male bettas... when i went to feed them today i noticed that one of them had fungis and there were some tiny lil itty bitty living worm type things on the glass... i took both bettas out and put them in seperate tanks and added fungis treatment to both even tho one of them had no fungis on him.... my question is this.... how should i clean out the ten gallon tank so there is no remaining fungis or any reoccurance in the future???