Mr Smiley
New member
The problem with getting to large a skimmer for your system is that it will not pull enough waste to form a stable head of foam. The foam will build and then just collapse pulling no waste out of your water. So yes you can go with a skimmer bigger than you need, but don't go to big as it will be more useless than a skimmer that is to small for your size system.
Ive read about this too. You have a 20g tank and put a skimmer rated for over 500g and you get nothing. This is where i dont want to go. However i want excellent water quality.