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09-07-2011, 04:58 PM | #1 |
Dragon
Join Date: Mar 2011
Posts: 1,276
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Is a Rio 20HF too powerful for my 4ft OHF?
I have a 4x2x2 that is currently running on a TOM800 which is 3200L/H at 0 height. I'm thinking about upgrading to a Rio 20HF but i'm afraid it might be too powerful and my OHF will overflow at the sides cos' the outlet can't let out water into the tank fast enough. My OHF has 6 trays at the moment, I did some research and found this chart online. The pump will probably need to pump water up to a height of about 2.5 feet to reach the rainbar of my OHF. Do you guys think i'll be fine? Advice is much needed and appreciated. Thank you!
http://www.riopump.net/products_pump...ow_models.html |
09-07-2011, 06:24 PM | #2 |
Dragon
Join Date: Jul 2009
Posts: 1,799
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Actually Tom800 is an awesome pump for 4ft ohf.. I used to use it.. 9trays also can support.. Low wattage somemore.. Some ppl even use it for 522.. Won't change it if I were u..
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09-07-2011, 06:58 PM | #3 |
Dragon
Join Date: Mar 2011
Posts: 1,276
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But it's current flow rate is probably below 3000L/H due to head loss and i'm trying to get an increased turnover for my tank. I usually like 10x although most hobbyists only go for 6x. Dilemma!
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09-07-2011, 07:08 PM | #4 |
Dragon
Join Date: Nov 2009
Posts: 1,597
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I have heard of rio 20 which overflow 5foot ohf w 12 trays. So I would probably advise you to get 17hf? Also agree tom800 is v good pump for 422.
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09-07-2011, 07:10 PM | #5 |
Dragon
Join Date: Jul 2009
Posts: 1,799
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09-07-2011, 07:17 PM | #6 | |
Dragon
Join Date: Mar 2011
Posts: 1,276
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Quote:
I usually go for 10x turnover for better filtration. More of the water is being pushed through the media at a faster rate. |
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09-07-2011, 10:04 PM | #7 |
Dragon
Join Date: Jul 2009
Posts: 1,799
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There are 2 sides of a coin bro.. Water flow faster through the media means less time for bacteria to act on the ammonia and nitrites.. High flowrate is good for mech filtration.. Slower flowrate better for biofiltration.. Do u think ponds have 10x flowrate or only 2x flowrate?? Food for thought..
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10-07-2011, 02:30 AM | #8 | |
Dragon
Join Date: Nov 2009
Posts: 1,597
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Quote:
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10-07-2011, 01:59 PM | #9 | |
Senior Dragon
Join Date: Jun 2006
Posts: 3,832
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Quote:
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10-07-2011, 02:27 PM | #10 |
Dragon
Join Date: Mar 2009
Posts: 703
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I have used both before.. 17hf is more appropriate imo.. 20hf more suitable for 5 ft
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