Hey! I've got 2 x Koralia 2 in my 75gal. They run smoothly! The only maintenance is related to removing from time to time algae that may get caught in the grill. However, I know that some people had problems with hard-starts! It will easily break after few attempts, therefore if you would like to plug your koralias to some sort of wave maker (like reefkeeper) go for tunze or other pumps. I hope this will help a bit! |