Jebao pump decision
 

I will be starting up a new tank but not sure which size pump to put in. I called /contacted a couple of retailers and got 2 different answers. I will be running a 210 gal tank (60x30x27h) with closed 3 holes. I used to run a 135g with closed loop (dart powered), 2 tunze 6100s and a return (approx 1000g per hr) for sps tank. I thought the flow is pretty good but the spread of the flow was ok on the tunzes. I'm leaning towards the rw20 on either side of the tank (corner)and dial down. Turning the power up as my tank starts to fill up (fingers crossed) but fear still be overkill? Or the rw 15s? What do you thing?

Thanks

From what I've read, most people would run 2 RW15 on a tank that size.

I would say it depends on the thickness of your tank. I think the rw 15s would be enough flow but whether they'll hold on your glass or not will be the big thing. I tried them on my 300 gal but they would just barely hold on the glass. My tank is a custom 300gal with 15mm sides. If your tank is made with thinner glass or factory made you may be ok. In the instructions it even says they are best to be used with less than 15mm glass. I would say 12mm would most likely be the max. Im hoping the rw20s are going to have stronger magnets then the 15's or I'll be sticking with the two gyres I have.

I think two RW-15s would be good too. I have two RW-8s on a 4 foot 120 gallon and I can't run them at full speed without producing a sandstorm. These powerheads pack a lot of punch.

Ron, how far from the bottom are you running your pump?

It will be a custom tank. I'm still debating to go with 1/2" or 5/8" (12 mm or 15 mm)

I think about 12 to 14 inches. Not home to measure it right now. But they are about half way up.

I usually place them 1/3 from top when i was running the tunzes in my old tank. Lower usually pushed the sand up for me

I'd recommend the 15's! I just put the 20s on my 300 and I have them on the lowest setting and have to redo my sand twice in the week I've had them on.

Thanks, how far is your pump from the bottom?

24" high tank,I have them as close to the top as I can enough so they don't suck any air. Approx 3/4

I think the RW20's are overkill in anything shy of 7-8 feet long. I bought two for my new 7 footer. I placed just one to test it out in my 79" long 100 gallon and on the lowest setting it blew corals right off the rocks.

The higher up, the more "wave action" they produce. I usually have mine halfway down in a 24" tank. Mine is a LPS-heavy 165g (just under 6') and keeping them low gives me a nice wafting motion, as opposed to whipping the frogspawns and hammers heads right off.:wink:

I have 2 rx 8 on a 6 foot 135 gallon tank opposite sides and at full speed they blow all the sand all over.probably the rx15 would be more then enough for your tank.

I would also vote for 2 x RW 15s.

Thank you for all the input. Looks like it's going to be the 15s