Hello! I have a 65 Reef thats been setup for about 5 years now and I'm adding a refugium to it to help with algae control. The way the tank is setup I can't put anything underneath the tank so I'm making it in my basement. I'm making it out of stuff I've accumulated over the years. The refugium will be in a 29 gallon tank and there is 10 gallon tank for the return. I'm using an Eshopps 300 overflow box for the drain which leads me to my question. Everything is up and running well but I have a big bubble in the U tube that comes back right away whenever I suction it out which I believe tells me the pump is not strong enough. I'm very worried I will lose suction leading to a big mess. I found a website with a pump head height calculator and after I entered in the lengths and widths of the PVC
as well as corners and ball valve info (The pump I'm using is a Mag 12) I figured the GPH
is 196, the Mag 12 is rated at 1200 GPH
. Do you think thats the reason for the bubble? Should I get a stronger pump? I do have an extra Mag 9.5, can that be added to assist with the flow? I have a guy thats h assisting me with the setup but I can't get him to call me back. FYI: The PVC
info is 12.7 feet vertical, 4.2 feet horizontal, (9) 90 degree corners and 1 ball valve. I'd like to drain the tank down a bit, just drill it but I'm nervous I'll break the tank having never done that. Any advice?