Tank drilled for closed loop - help?

jcm1229 · 04/08/2007, 07:29 PM

I've been searching for a oceanic cube 37g (24x18) and finally have a lead on one. It's drilled for overflow and has 3 holes for a closed loop (see pic).

I've never thought about doing a closed loop, don't know what I'd need for it and don't know if the hole positions are conducive to it. Before I close the deal, I'd like some opinions as to whether this would be good.

I know I could plug the additional holes and not use them, but I'd rather not plug them.

Thanks!

Any suggestions/comments will be greatly appreciated.

I plan to make this a sps tank with a 250 halide lighting it.

silverwolf72 · 04/09/2007, 01:52 AM

If it's there I would diffidently use them. You could add some Loc Line so you'll be able to aim the return flow. Only have experience with the Dart pumps so maybe some will help suggest a good CL pump.

Icefire · 04/09/2007, 02:04 AM

Lets say #1 to 4 holes are from left to right.

I would do:

1- Drain
2- Return from #1
3- Drain for CL
4- return for CL

What size are the bulkhead?

CCR · 04/09/2007, 03:28 AM

Quote:

Originally posted by Icefire
Lets say #1 to 4 holes are from left to right.

I would do:

1- Drain
2- Return from #1
3- Drain for CL
4- return for CL

What size are the bulkhead?

One thing to consider with using #2 as the sump return is the back siphon that can occur if you lose power. When the sump pump stops working, water will drain from #2 until half your display tank water drains. A check valve may prevent a sump flood, but a check valve failure means trouble.

jcm1229 · 04/19/2007, 08:27 AM

All the bulkheads are 1 inch. I will use the top left for drain and return over the top.

What do you recommend for the other 3 for the closed loop.

I'd plan to use the 2 middle ones for CL outputs, but I'd probably put some locline thorugh my rockwork. I could also use some elbows to divert it more towards the side.

The lowest was meant to be used as the CL intake, but I'm concerned that even with a strainer, it could get clogged and with rockwork likely there, I'd have to pull all the rock to gain access.

A local reefer suggested plugging the bottom or using the bottom as a CL return diverting that flow sideways behind the rockwork.

I'm looking for suggestions and ideas.

Thanks!

SDguy · 04/19/2007, 09:01 AM

The intake for your CL needs to be cleaned periodically...I would not make it the lowest/least accessible hole.

04/09/2007, 02:04 AM	#3
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Lets say #1 to 4 holes are from left to right. I would do: 1- Drain 2- Return from #1 3- Drain for CL 4- return for CL What size are the bulkhead? __________________ Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT Lights @ 100% all others, 35% White Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI

04/19/2007, 09:01 AM	#6
SDguy Fish heads unite! Join Date: Mar 2003 Location: San Diego Posts: 23,384	The intake for your CL needs to be cleaned periodically...I would not make it the lowest/least accessible hole. __________________ Peter SDMAS member Marine tanks since 1989. ><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º> ·´¯`·.¸. , . .·´¯`·.. ><((((º> Current Tank Info: 240g butterfly and angel FOWLR. 15g QT.

04/08/2007, 07:29 PM	#1
jcm1229 Registered Member Join Date: Dec 2001 Location: Park Ridge, IL Posts: 1,780	Tank drilled for closed loop - help? I've been searching for a oceanic cube 37g (24x18) and finally have a lead on one. It's drilled for overflow and has 3 holes for a closed loop (see pic). I've never thought about doing a closed loop, don't know what I'd need for it and don't know if the hole positions are conducive to it. Before I close the deal, I'd like some opinions as to whether this would be good. I know I could plug the additional holes and not use them, but I'd rather not plug them. Thanks! Any suggestions/comments will be greatly appreciated. I plan to make this a sps tank with a 250 halide lighting it.

04/09/2007, 01:52 AM	#2
silverwolf72 Registered Member Join Date: Jul 2005 Location: Lake Forrest CA Posts: 1,732	If it's there I would diffidently use them. You could add some Loc Line so you'll be able to aim the return flow. Only have experience with the Dart pumps so maybe some will help suggest a good CL pump.

04/19/2007, 08:27 AM	#5
jcm1229 Registered Member Join Date: Dec 2001 Location: Park Ridge, IL Posts: 1,780	All the bulkheads are 1 inch. I will use the top left for drain and return over the top. What do you recommend for the other 3 for the closed loop. I'd plan to use the 2 middle ones for CL outputs, but I'd probably put some locline thorugh my rockwork. I could also use some elbows to divert it more towards the side. The lowest was meant to be used as the CL intake, but I'm concerned that even with a strainer, it could get clogged and with rockwork likely there, I'd have to pull all the rock to gain access. A local reefer suggested plugging the bottom or using the bottom as a CL return diverting that flow sideways behind the rockwork. I'm looking for suggestions and ideas. Thanks!