i used to hate HOB's. mainly coz my sis had one on tank a aquaone. it sux ****. then i decided to buy a resun HOB for my betta 10 gallon tank. i also added some extra media at the bottom in less than 24 hours the tank was clear. although it is a pain in the a*** to feed them. and its to strong. this is gonna be a small planted tank once i get my fx5 and do other stuff. anyway im now officially a HOB junkie.and i will offer to buy one for my sister.