Is a Rio 20HF too powerful for my 4ft OHF?

Sunday · 09-07-2011, 04:58 PM

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

ranmaru1987 · 09-07-2011, 06:24 PM

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..

Sunday · 09-07-2011, 06:58 PM

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!

Saphere · 09-07-2011, 07:08 PM

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.

ranmaru1987 · 09-07-2011, 07:10 PM

Quote:

Originally Posted by Sunday

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!

what is the reason for u wanting 10x??

Sunday · 09-07-2011, 07:17 PM

Quote:

Originally Posted by Saphere

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.

Whoa! That's scary. Okay now that you've said that, i'll decide against the 20HF then. Thanks Saphere!

Quote:

Originally Posted by ranmaru1987

what is the reason for u wanting 10x??

I usually go for 10x turnover for better filtration. More of the water is being pushed through the media at a faster rate.

ranmaru1987 · 09-07-2011, 10:04 PM

Quote:

Originally Posted by Sunday

Whoa! That's scary. Okay now that you've said that, i'll decide against the 20HF then. Thanks Saphere!

I usually go for 10x turnover for better filtration. More of the water is being pushed through the media at a faster rate.

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..

Saphere · 10-07-2011, 02:30 AM

Quote:

Originally Posted by ranmaru1987

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..

Have heard of this as well, but mod Sparkase did question the theory before. For me, I rather save the money and get better media.

Tustar · 10-07-2011, 01:59 PM

Quote:

Originally Posted by ranmaru1987

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..

No right no wrong imo

JackFish · 10-07-2011, 02:27 PM

I have used both before.. 17hf is more appropriate imo.. 20hf more suitable for 5 ft

09-07-2011, 04:58 PM	#1
Sunday Dragon Join Date: Mar 2011 Posts: 1,276	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

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

09-07-2011, 06:24 PM	#2
ranmaru1987 Dragon Join Date: Jul 2009 Posts: 1,799	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..

09-07-2011, 06:58 PM	#3
Sunday Dragon Join Date: Mar 2011 Posts: 1,276	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!

09-07-2011, 07:08 PM	#4
Saphere Dragon Join Date: Nov 2009 Posts: 1,597	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.

10-07-2011, 02:27 PM	#10
JackFish Dragon Join Date: Mar 2009 Posts: 703	I have used both before.. 17hf is more appropriate imo.. 20hf more suitable for 5 ft

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)