How much gph for my 20 gallon long?

[dulcisveteranus]

Don't say 20x the water volume because other reefers say thats too much. I'll be using two powerheads and aim them at an angle at a side of your tank so it delfects off the tank glass. I how much gph do I need around? And can you send me a link to purchase these. Are these good? 200 GPH Submersible Pump Aquarium Fish Tank Powerhead Fountain Water Hydroponic | eBay
My tank is 30 inches long, 12 inches wide, and 13 inches tall. I will be keeping Zoas, mushrooms, Lps, and one or two hardy sps corals.

 

[bribo12]

I'd run 2 of the koralias. A 425 and a 240 if it is a 20 long. That will give you good spread out flow throughout the tank. Are you running a sump? And yes that is over the 20x tank volume mark but the koralias have a nice spread out even flow. No blasting.


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[dulcisveteranus]

http://m.ebay.com/itm/800GPH-Aquari...ion-Pump-Suction-Cup-/330894752338?nav=SEARCH
The Koralias seem kinda expensive. Are these okay and do you know if they have adjustable flow?
I heard many good reviews from other reefers, only problem is that the suction cups don't stick sometimes.

Right now I am using a cheap internal filter to cycle the tank but soon ill get a fuval 306 canister.

 

[Laeris]

Could try Rio brand. Little bit cheaper, I have their 50 in my nano. Between it and my HOB, there aren't any dead spots in the tank.

 

[dulcisveteranus]

Are the rio brands loud? How long have you had them?

 

[Laeris]

Silent. Current one for a week, but the reviews I've read are more positive than the similarly sized from Hydor. Either way, they'll make noise if you don't keep them clean.

 

[gboduszek]

You could check out the jebao wp10. Very powerful for its size and comes with the wavemaker controller. Runs around $50 I think? I use one in my 20L with a 425 gph koralia on the opposite side pointed behind my rock to take care of any dead spots

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[Mebbid]

The hydor koralia is the best quality for your money. They are super reliable powerheads that i couldnt recommend more.

As to the flow, a commonly accepted flow rate for reef tanks is 10x to 40x the flow rate per hour. Everyone is gonna have their opinion, but that amount is the mosy widely accepted.