Overflows

[Madreefer]

I've always had drilled tanks and have never used these external overflows. Do they work good and how problamatic are they? I picked up a 75G tank and looking to turn it in to a fuge and turning my present fuge which is 35G in to a frag tank. I'm looking at a CPR C-Siphon 300GPH one. Will it be sufficient or should I go bigger?

[RDNanoGuy]

If you got time to source one the best overflow on the market is the LifeReef models. I have had good experience with the Eshopps brand overflows as well. I'm not a fan of the CPR overflows. They are designed to use the aqualifter pump to maintain prime which to me is a stopgap measure to fix a poorly designed overflow.

300gph should be plenty for a refugium. Are you going to gravity drain the refugium tank back to the sump?

[Madreefer]

Yup. Gravity feed to sump is the plan.

[Mike-fish]

why not drill the tank

[Madreefer]

Well it was being stored at my place for a buddy. Well hes decided to sell it to me so i might as well put it online with my system. It's up a running and I really don't want to take it down to take to the glass shop. When I've taken tanks there before I can't pick up for a few days. I also don't know if it can be drilled and being lazy is another contributing factor.

[Mike-fish]

Yeah if it's online it's a bit of a pita if its just water it's not bad. Drilling a tank is a piece of cake honestly once you get past the nerves.