Comments on: Closed Loop Circulation – How Hard Is It To Install http://www.aquaristsonline.com/blog/aquarium-equipment/water-movement/closed-loop-circulation-how-hard-is-it-to-install/ Information And Resources For Anyone Interested In Aquarium Fish, Saltwater Aquariums, Tropical Fish, Home Aquariums. Aquarium Care, Aquarium Equipment And Much More. Mon, 06 Feb 2012 11:21:50 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: John http://www.aquaristsonline.com/blog/aquarium-equipment/water-movement/closed-loop-circulation-how-hard-is-it-to-install/comment-page-1/#comment-7036 John Fri, 25 Jan 2008 19:35:39 +0000 http://www.aquaristsonline.com/blog/aquarium-equipment/water-movement/closed-loop-circulation-how-hard-is-it-to-install/#comment-7036 Thanks for the input Andy. Personally, if I can get away without tank drilling I will. If I needed high flow (I don't as I love soft corals) I'd go for the high output stream pumps. There are those who will disagree (fair enough) as they'd say I'm ignoring lower water flow. Thanks for the input Andy. Personally, if I can get away without tank drilling I will. If I needed high flow (I don’t as I love soft corals) I’d go for the high output stream pumps. There are those who will disagree (fair enough) as they’d say I’m ignoring lower water flow.

]]> By: Andy http://www.aquaristsonline.com/blog/aquarium-equipment/water-movement/closed-loop-circulation-how-hard-is-it-to-install/comment-page-1/#comment-6975 Andy Thu, 24 Jan 2008 23:49:06 +0000 http://www.aquaristsonline.com/blog/aquarium-equipment/water-movement/closed-loop-circulation-how-hard-is-it-to-install/#comment-6975 One thing to keep in mind when planning an over-the-top closed loop system is the possibility of cavitation if the plumbing is too small in diameter. I tried building a closed loop using an Eheim 1262 pump driving an SQWD, using a 1.5" schedule 80 (I wanted the in-tank plumbing to be grey, so used sch. 80) drain from the tank and ended up cavitating the pump resulting in a serious micro-bubble problem and no obvious solution... 1.5" plumbing is as large as I'd want in my tank (for purely cosmetic reasons). Given that, I abandoned the closed loop and (eventually) went to a couple of the controllable Tunze Nano Streams (the 6055 model). I'm left with the feeling that the over the top style closed loop works best with lower-flow applications; for high-flow I'd drill the tank or go with stream-style power heads. One thing to keep in mind when planning an over-the-top closed loop system is the possibility of cavitation if the plumbing is too small in diameter. I tried building a closed loop using an Eheim 1262 pump driving an SQWD, using a 1.5″ schedule 80 (I wanted the in-tank plumbing to be grey, so used sch. 80) drain from the tank and ended up cavitating the pump resulting in a serious micro-bubble problem and no obvious solution…

1.5″ plumbing is as large as I’d want in my tank (for purely cosmetic reasons). Given that, I abandoned the closed loop and (eventually) went to a couple of the controllable Tunze Nano Streams (the 6055 model).

I’m left with the feeling that the over the top style closed loop works best with lower-flow applications; for high-flow I’d drill the tank or go with stream-style power heads.

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