65g Coralife Superskimmer Issues

[Beanz]

I was running this skimmer in my 45g and 15g with a small sump and all of the sudden the skimmer went crazy and i couldn't get the darn thing to not overflow even with adjusting the valve all of the way it still overflowed. It also produced a very excessive amount of micro bubbles like the whole skimmer was full of them and it pumped out way too many, not like before it started having these issues. Anyways i am just running my 15g with a sump with like 15g of water in the sump with an oceanic skimmer but would like to fix to coralife one as it was a good skimmer before these issues sprung up. Any ideas on what could be wrong with it, and how to fix it?