I tried getting my sump up and running last weekend. I have a 30g with a 10g tank for sump. CPR overflow with 3/4" flex tubing to the sump. Rio 1400 with 3/4" flex tubing back up. Everything was functioning and working as designed except... the drain into the sump was dumping a TON of air into the sump. Anyone know how to remedy this? If that's how it works, I'd rather just do without it. Thanks