Originally posted by roadrunner
yes i did, thanks
msd2 - i looked at the lifereef overflow boxes and i like what i saw. i was wondering, if i'm getting an overflow that moves 700 gph, what type of return pump should i look at, as in the gph returned to the tank?
also - i'm worried about a flood, the tank is in my bedroom and this is my parents house, so what type of precautions can i take to insure that a flood wont happen?
Well the lifereef is a good first measure. I cant really afford a flood either. Drill a small hole just below the water line on the return pump to the tank. That way if the pump shuts off unexpectedly it will break the siphon and only bring a little bit of water back down.
I also hard plumbed all the plumbing. Not really necessary but I know I dont have to worry about a clamp coming loose and a hose slipping off. If you do decide to use pvc tubing I highly highly suggest using a union or two, it gives you an easy way to take it apart for cleaning, etc, but also gives you some additional points to adjust your plumbing w/o stressing any joints.
If you go with a lifereef you will want to build a durso or standman pipe. They make the overflow totally quiet, and are easy to build as well as cheap. I looked at my overflow and its a amircal, which is a knockoff of the lifereef. It was worked perfectly as well.
I would say if you do those things ur chances of an overflow are pretty slim, just make sure ur sump is large enough to absorb the water down to where the overflow stops flowing, probably around 3-6 gallons.
As far as pumps I have always love Iwaki pumps, quiet, not too much power and good flow. I tried on a whim a quiet one 4000 and I gotta say its a kickbutt little pump, it keeps up with my Iwaki and was half the cost. the longivity is yet to be seen but its been going 2 or 3 months and is still strong. The other perk with the quiet 4000 is it can be submerged or external, really nice and really rare. Honestly when the Iwaki goes and the quiet one is still performing like it is I will buy a second one.
The thing is you need to keep the flow rate close to the overflows limit because the only way the u tube overflow fails is when bubbles collect in the top of the tube and are not pulled through, eventually accumilating and breaking the siphon. BTW my overflow was rated at 700 also, and its nowhere near that. If I didnt have a ball vavle on the pump it would outpump the overflow. I am guessing it is able to do about 500gph. If this is too much flow for your tank you can control it by replacing the size of the overflow u tube. Any lfs will have them in different diameters, and its kinda a trial by fire thing. You can watch it for awhile and see if bubbles build upon the to of the u and if so get a smaller tube if not then consider it done. Same can be done the other direction, you can increase flow with a larger u tube. I didnt bother to be honest because well the tank I get on saturday has the overflow built in :happy:
I would say if you get the tube correct for the overflow, drill the return line, and build a large enough sump your chances of overflow are pretty low. The only flood I have had is when I made DI water, and that was my own stupidity (fell asleep with it running into a container).