Originally Posted by frozenoak
Thanks for the info. I am working with an architect to include all the necessary plumbing for just such a set up.
Does the EI dosing method work for a tank on this scale? What kind of filter(s) would be wise for a setup of this size. I was thinking 3-4 canister filters maybe 1-2 without any filter media mostly for flow. Also, could you expound on a sump overflow?
Yes, you'll need to have the plumbing installed correctly as well as a drain neat by and build a small 1-2" rim around the tank (below) on the floor so that if a leak does ever occur, a sump over flow etc, the water will go down the drain, not out into the room etc.
I use EI on the tank, the growth is dramatic.
I use a dosing pump set up.
I dose daily with a timer and refill the reservior once a week and do my water change and trim on the same day.
I can refill, prune, clean, etc in about 2 hours. I do about 80% water changes, but 40-50% are fine also. Some go longer and do once every two weeks.
I use 20lb tanks. Do not use 50's, they are a PITA to pick up and move around.
I'd use a sump since the evaporation is high on large tanks anmd this prevents scale on such a nice large tank and keeps all sorts of tubes and crap out of the tank.
Overflow also keeps the surface clean and clear.
Your pond will look great if you do that, set it up so you use the pond water for irrigation etc, then drain the pond for that, then refill as you do the water change on the tank.
This will give you 3 different uses for the water.
Spectrapure makes a electronic float switch FYI.
I would keep the water change method manual, but very easy(just turn a valve and that's it.)
This is safe allows you to work on the tank when you do not have to put your head underwater. THIS IS WHY YOU need to do LARGE WATER CHANGES!!
Try pruning and replanting in 24" deep or deeper tanks for an hour sometime and clean glass etc.
While the tank is drainign and refilling, you do the prunign at the lower water levels, net out leaves etc near the end of the refill, refill things and work on other mainteance while it first starts to drain etc.
I think a single CO2 gas tank and 2 needle valves is the way to go and have a 20 lb for a back up when one runs out.
I run 2 reactors but.........it was someone else's set up. I'd make a large 3 x 22" PVC pipe(you can use acrylic and use PVC fittings) and add bioballs, 3/4" in, 2x 3/4 out the bottom and use a large Ehiem pump or a 500-600gph pump and feed the CO2 into the top of the chamber with a tube that extends all the way down inside or also you can fed the gas directly into the suction side of the pump.
Start with 4-6bubbles a second and go up from there.
PC+ MH's will make a nice flexible mix.
I'd use the hellolights.com 8800K 55w bulbs(11$ ea!!! right now), A&H retro kits (8x 55w) and then 4 x 150w HQI's.
Onyx sand, call SeaChem and ask if you can get a dealer discount from a local vendor.
Ferts: Greg Watson
Traces:TMG and flourish are the best I've used.
Spend ___lots of time__ on the hard scape/wood/rock before planting and filling.
Sump over flow is a wet dry filter style set up, seal the wet dry section with duct tape so that air does not echange, the bacteria in there will release CO2 as it converts any NH4 into NO3.
So there are no losses except in the over flow, raising that level with prevent degassing also. So adjust the over flow level to 4" below the surface of the tank to minimize splash.
See any sump/wet dry filter design.
Tom Barr www.BarrReport.com