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Old 11-24-2013, 04:23 PM   #11
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Did a little more research on the hydor pumps personally I would still get the 425 and here is why.

Price difference $1.
Hydor 240 rated for 10-15 gal tank
Hydor 425 rated for 15-30 gal tank

Also did some looking on a couple of other forums and some people were saying that the 425 was under powered for their 16gal tank but they had some corals too. My 425 in my sump is in a portion that is the equivalent to a 10 gallon tank. I have a sand bottom in the sump also. I have the pump mounted on one side blowing directly across to the other and the flow just reaches. I think if you got a 240 you would end up buying another one and be in it for $50 instead of $25. I even had it in a 10gal salt I was messing around with at one point. They are nice and small too
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120 Mixed Reef Tank.
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Old 11-24-2013, 04:54 PM   #12
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So 425 is good if i get it?
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Old 11-24-2013, 05:20 PM   #13
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Yes, That is what I would get if it was my tank.
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Old 11-25-2013, 05:36 AM   #14
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Quote:
Originally Posted by Ljfdfireboy View Post
Yes, That is what I would get if it was my tank.
If i got any powerhead more than 400 flow rate it will be too strong for my aquarium?
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Old 11-25-2013, 02:26 PM   #15
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You would be fine in your 15 gallon tank. I had the 425GPH circulation pump and a 294GPH return pump in a 10 Gallon tank and was thinking about adding another pump before I just scraped the whole tank. You will be good with the 425. If you are nervous about it go with the 240 and if you have issues with cyano down the road add another 240 pump.
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