Ok, does the ac110 motor normally sound just a little rattly, not much, but I just want to make sure mine isnt defected. So now that Ive got the ac 110 on this 125 gal, do I need another 110, or would a smaller eheim canister be good with it, maybe just an ac70. Im mostly concerned with the sound of the ac110, wonder if 2 of them might be a rattly ruckus. Let me know what yours sounds like if you could. I see some smaller eheim canisters on amazon for like 89 bucks.