Originally Posted by original kuhli
Ok, because a conventional sump makes me too nervous when combined with hardwood floor, stairs and carpet I'm trying to figure out a way to build a sealed sump for below the tank. I'm thinking this for the following reasons:
1. Spill proof
2. Remove EVERYTHING from the tank, except the inlet and outlet
3. Use a cheaper pump for high volume circulation
I'm thinking of doing the following things in/around the sump:
1. CO2 reactor
3. Water changes
4. Water quality monitoring (pH, TDS)
1. Sealing cords into and out of the sump reliably (read, leak possibility)
2. Sealing the opening to the sump (ie, O'ring seal or something reuseable, so we're not putting silicone on every time.
3. Keeping the sump from air locking.
4. Reliable water tight connectors for water changing (automated or not?)
I still forsee a standard canister doing the filtration for the tank, its possible they could be hooked up in serial or parallel. My little giant pump has a far greater rate than does my rena xp3 so I'm not sure about assembling them in serial.
For some reason the best material I can think of is acrylic, I can see a pretty robust sealing mechanism being built with it. However, I'm sure there are some other water tight ready manufactured units that could be adapted nicely.
Anybody have any ideas?
I am using a setup similar to the one you are describing. You will want to research the sump setups on the reef sites. They will give you the best advice on your setup. The goal to avoid flooding is accomplished by carefully planning the entire system before you start. I put months lot of thought in to my tank setup to make it bullet proof.
With a syphon overflow you run the risk of the syphon somehow being broken and your top tank overflowing. To eliminate this risk I used a tank with pre-drilled overflows, gravity is all that is needed and the syphon is not necessary.
To prevent a syphon on your return line back thru the pump in the sump from overflowing your sump when the power goes out and the pump is off, you can put a tiny hole in the underside of where the spraybar attaches.
Remember when the pumps are off all the water in your pluming and the water above the overflow or the spraybar hole will drain back to the sump, so leave room for it when filling the sump.
As a secondary and part of my auto water changer, I have an overflow drilled into my sump tank that is connected to my house drain. This prevents me from over filling the sump.
Here is a link to more details of my setup: