Oceanic RR drain volumn

[captexas]

I'm trying to figure out what size return pump to put on my 240g tank. It is reef-ready and has two 1in. drain lines that will feed the sump. Playing with the RC overflow/drain calculator, it comes up to roughly 500gph max for each 1in. pipe for a total of 1000gph. I was hoping to push two sea-swirls (800gph each) and another DIY canister filter at about 250gph for a total of around 1850gph. I'm guessing this won't work?

What are your experiences with the Oceanic overflows in how big a pump you can put on the return and the drains still keep up?

[jaded]

closed loop...

[captexas]

That is not the answer to my question and I wasn't looking for alternatives either. I have a closed loop already planned with 8 other returns on the tank. I want to feed the sea swirls from my sump using the existing return bulkheads in the Oceanic overflows.

From what I read on the dursostandpipe website, he says it's around 600gph normally for a 1in. bulkhead return, but can be increased a bit by widening the teeth openings in the overflow and having a smaller hole in the top of the standpipe.

[don-n-sa]

closed loop... lol...not the question that Chris was asking.

Yes two one inch drains will not be able to handle 1850gph...On Blakes system...which is now Texas Todd's he made all of the holes in the overflows drains and put the returns over the top of the tank, that way he was able to use the sequence hammerhead.

Why dont you make all of the holes drains and just make your own returns and have them come over the top...I believe that is what Mikey boy did with his set up.

[z28pwr]

Cap, according to the ReefCentral calculator it's 600 GPH, which if you have two would be 1200 GPH but considering head loss and the fact the you can push a bit more I think you would do just fine with a 1500 GPH pump or depending on your plumbing even more, but I don't know about 1850. I once ran a MAG 18 on a double 1" external overflow and it was at the limit, and water level in the tank was very high, but then again I only had 6FT worth of hose and 4 of them were head pressure from the MAG18 to the tank, thus if you have more plumbing then that maybe you can get away with it.

[captexas]

Don - thanks. Yeah, I was thinking about that idea as well, using both the 1in and the 3/4in. bulkheads as drains. I'd like to see a pic (or in person) of how they did it and if they used durso's for both in the same overflow. The durso website says it can take some adjustments to get two to work in the same overflow to make sure they both are sucking in water steadily.

If possible I'd like to also feed my fuge from my sump so that adds a bit of volumn to it as well. I guess I can just have the sea-swirls running at a bit less.

[jaded]

sorry about that... I missed the question completely!

I was simply thinking of my bubble problem trying to run a significant amount of water through my 50 gallon sump. sorry for the confusion

[don-n-sa]

did you already buy the durso's?
If not the CJ stadpipes take up less room in the overflows and work just as good if not better IMO

I had a pair of CJ's on my 100g and now I have a pair on my 240g...they work great.

here is a link to the site where the make the CJ's...tell him Donny gave the reference.

http://www.nautilusreef.com/html/cjstandpipes.html

[captexas]

I haven't made them yet. The size isn't really an issue with those huge overflows on the Oceanic (12in. x 8in.) Kind of hard to tell how those CJ's work just by the pic on the site. I assume there are multiple holes underneath the top piece/hood for the water to drain. I'd be interested to see one as other than being in black PVC, they look like they could be made from regular fittings from the hardware store.

[don-n-sa]

you can come by to check mine out...in fact I have an extra pair, they are yours if you want them.

Their have been a few pepole here on MAAST that tried to copy them...they did not work right.

let me know Chris.

[brewercm]

Just curious if that calculation of 600- GPH is for standard wall pipe or thin wall PVC. I have a bunch of thin walled PVC you are welcome to. Actually I already have a couple of dursos made up from the thin wall if you want to try them out. I had made them to use with my 180 that never got up and going just haven't checked them for length yet, may need a little cut off.

[captexas]

Cliff - I'm not sure, but I would assume it's for sch 40 PVC.

[brewercm]

Actually you can have the dursos since I won't be needing them any time soon, the 100 gallon I bought has some already if I set it up.

Let me know and I can swing them by one day since I'm pretty sure they're sitting in a box at the new house.

[captexas]

Sure Cliff, that would be great. Don gave me two of the style he mentioned that he has on his tank. I'll try both types and whatever I don't use I will return to you or Don. It will most likely be a few weeks at best though! :)

[brewercm]

No hurry on mine. I have plenty of the PVC to make more if need be. I'll put them in the car and give you a call tonight and see if you'r around.