A week ago I switched from an HOB
to a canister filter & ever since my water temp has dropped 3-4 degrees. I've moved the heater in relation to the output but no change. I've upped the temp on the heater & it's slowly going up but I'm wondering if I need a bigger heater or need to re-arrange input-outflow-heater. It's a 46g w/ Fluval 306 & an Aqueon 150 htr.