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  #1  
Old 01-10-2015, 07:21 PM
thanhjenn thanhjenn is offline
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Quote:
Originally Posted by Skimmin View Post
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.
It will be a custom tank. I'm still debating to go with 1/2" or 5/8" (12 mm or 15 mm)
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Old 01-10-2015, 07:30 PM
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I think about 12 to 14 inches. Not home to measure it right now. But they are about half way up.
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Old 01-10-2015, 07:34 PM
thanhjenn thanhjenn is offline
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Originally Posted by Ron99 View Post
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
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Old 01-10-2015, 07:49 PM
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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.
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Old 01-10-2015, 07:52 PM
thanhjenn thanhjenn is offline
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Originally Posted by Gools View Post
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?
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Old 01-10-2015, 07:55 PM
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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
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  #7  
Old 01-10-2015, 08:40 PM
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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.
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  #8  
Old 01-11-2015, 01:22 AM
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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.
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