Looking for advice on heating tank with RKL

[neoh]

In regards to something going on - you're right, I always assume the worst. I bought the reefkeeper for the same reason.

Make sure the one you get fits! I have an Aqueon 3 sump as well, and my 250w heater didn't fit properly in it.

I actually ended up swapping the Aqueon around because I think it's a poor design. I have the overflow go into the last chamber, which is now the fuge, the skimmer in the middle, then removing the socks - I put the return pump in the corner. It was a tight squeeze, but I managed to get it in there.