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View Full Version : Powerheads for my 220g - RW-15 or RW20?


cleverbs
04/08/2015, 12:15 PM
Alright so I have attached just a little sketch in paint. I am trying to figure out two things.

1.) Do you think this plan for placement is a good idea?

2.) Should I get 2x RW-15 or 2x RW-20s

The tank is a 220g SPS tank. The tank will be BareBottom. What I am tryiing to do is remove the sight of powerheads on the side of the tank, maximize flow, keep things suspended, and finally remove any form of dead spot.

This tank will be different then what I have had before because there will be only the one structure.

Current powerhads I use - 1x Grye 150 (Red Pump in picture), 2x WP40's (Blue Pump)

I want to buy two RW pumps just not sure what size would be best. The reason I am putting the WP40's on the bottom is because right now they only run on "High" because they both have controllers that cant be controled anymore. I will end up buying a new controler to fix them later.

cleverbs
04/08/2015, 01:45 PM
any thoughts?

toothybugs
04/08/2015, 01:53 PM
I would have suggested 4x RW-20s, to be honest.

It's bare-bottom after all.

cleverbs
04/08/2015, 01:57 PM
You think I would need 4x RW-20's, 2x WP-40s, Gyre? thats like 155x tank volume...thats a TON of flow. thats 34,200+ GPH in my tank.

coralsnaked
04/08/2015, 02:25 PM
Adding RW 15 x 2 = another 4000gph and that's plenty

cleverbs
04/08/2015, 02:44 PM
I think ill just add 2x RW-20's

I am also talking to someone right now about trading my Gyre for 2x MP40ESW's That would be nice for my tank I think based on how I want to put the power heads in the tank.

cleverbs
04/09/2015, 08:59 AM
Bump

whosurcaddie
04/09/2015, 09:50 AM
Adding RW 15 x 2 = another 4000gph and that's plenty

I agree. Plus smaller size than the rw-20

cleverbs
04/09/2015, 10:20 AM
I just dont know if the 15's will give enough flow.

rwb500
04/09/2015, 02:09 PM
I just dont know if the 15's will give enough flow.

they won't. a bunch of not very bright people don't realize that the speed setting does nothing on random mode for the RW pumps, so they think they are running their pumps at 1/8 speed when the pump is actually going at full speed. So then they come on reef central and post that RW pumps are way overpowered. They are actually quite accurately rated compared to vortech/tunze. so two rw-15's is only slightly more power than two MP40's, which as we know is not nearly enough for a 220G SPS tank.

cleverbs
04/09/2015, 02:30 PM
they won't. a bunch of not very bright people don't realize that the speed setting does nothing on random mode for the RW pumps, so they think they are running their pumps at 1/8 speed when the pump is actually going at full speed. So then they come on reef central and post that RW pumps are way overpowered. They are actually quite accurately rated compared to vortech/tunze. so two rw-15's is only slightly more power than two MP40's, which as we know is not nearly enough for a 220G SPS tank.

Agreed.

whosurcaddie
04/12/2015, 09:08 PM
they won't. a bunch of not very bright people don't realize that the speed setting does nothing on random mode for the RW pumps, so they think they are running their pumps at 1/8 speed when the pump is actually going at full speed. So then they come on reef central and post that RW pumps are way overpowered. They are actually quite accurately rated compared to vortech/tunze. so two rw-15's is only slightly more power than two MP40's, which as we know is not nearly enough for a 220G SPS tank.

Thanks for calling me not very bright since it seems you didn't read the OP He said he already had two mp-40's and a gyre 150. He wants to add the RW's not just have them as standalone.

If he bought the rw-15's he would have over 90X turnover... but I guess thats not enough?

cleverbs
04/13/2015, 07:37 AM
I would have 90x turnover if I ran the 15s at full speed, I have always felt pumps last a lot longer if you run them at <80% and I could do that with the 20s and still get 100x turnover. Just talking here, healthy debate.

Dmorty217
04/13/2015, 08:02 AM
I had two wp60s in my 220g that would come on at night when my closed loop would shut off. There was a lot of flow and virtually no dead spots with them on. I know they don't make wp60s anymore but im sure there is some replacement they have for them

cleverbs
04/13/2015, 08:28 AM
the RW-20 has the same flow as the WP60

Art13
04/13/2015, 08:52 AM
i have a wp-40, equal to the rw15, in my tank, with a sand bed and its not enough flow, i will have to pick up another powerhead in order to bring the flow up, probably an rw-8. this is on a 90g 4 foot tank. on a 6 foot tank with over double the capacity i'd really think about at least two rw 20s or 2 rw 15's with supplemental powerheads. i believe the flow power can be controlled better on the new ones, and can always be turned down, they can't be overtuned.

Dmorty217
04/13/2015, 09:11 AM
the RW-20 has the same flow as the WP60

Ah ok, you will have to forgive me I haven't shopped around for power heads in the past year