Hydor 600 skimmer - Help!

[Navarchus]

Always when you change skimmer the new one take out all the old one didn’t!
If your skimmer isn’t resting now and then it is too small for your system.
If your skimmer never skims it is probably too big for the system.

Few things you should consider:

- What size is your system?
- What is the bio load?
- Try to put the air tube in a glass of hot water and let it suck all the water. This should clean the air passes from clusters of calcium, fat, and other doc.