plumbing

Hi everyone. I’m experiencing condensation above the hose clamp where the tubing connects to my Hydor inline canister filter heater. The clamp is tightened, but moisture still forms. There aren’t any leaks from it. I've checked the tubing and fitting, both seem fine. Is this normal. Thanks!

Hellooooo! First post in nearly 6 years (probably!) Im trying to plumb a sump. Local plumbing shops have palmed me off, local Aquarium shops directed me to said plumbing shops and videos and threads I've come across haven't given me the confidence/answers i need. Has someone a good guide to...