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Old 05-15-2004, 09:51 AM   #1
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Too much water flow?

I have a 20 gal tank and have two powerheads. One is a Aqua Clear 402 (inherited from a coworker and can pump 270 gal/hr) and then I just purchased a rotating Powersweep 214 (max 160 gal/hr). Is this too much for my little tank? I have some small featherduster like organisms on my live rock and they are swaying like mad!

I have the larger of the two powerheads on the left back side, about 3/4 of the way down the tank facing the center of the tank. The smaller rotating powerhead is about a quarter of the way up on the right hand side of the tank.

In the way of livestock, I have some hermits, snails, an emerald crab and a spiny urchin. I just changed out the crushed coral bottom and am giving everything time to adjust before I add the fishies.

Thanks a bunch!

Marlin: Okay, a mollusk walks up to this sea cucumber, well he doesn't actually walk, he's just there, and he turns to the sea cucumber, and... Well, wait, there's a mollusk and a sea cucumber and...
Chum: You know for a clown fish, he's not that funny.
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Old 05-15-2004, 02:50 PM   #2
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I would point the aqua clear closer to the top and point it towards the top and put the other one on the opposite side.

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Old 05-19-2004, 03:42 AM   #3
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I agree with putting it towards the top and making the surface moving more to break the tension so gases can escape. The 2nd power head in the other direction near the bottom with take care of the rest of the tank. Surface agitation is so important in a tank. If everything moves too quickly those filter feeder won't have a chance catching anything.
50 gallon saltwater fish only...1 mated pair yellowtail damsels, neon dottyback, tomato clown, huma trigger, lemonpeel angel, 12 stripe wrase, bi-color blenny, dozen or so hermit crabs-scarlet and mexican, cerith snails, turbo snails, orange linkia starfish, 50 plus pounds of purple-pink coraline encrusted rock and a few mushrooms.

Redsea prism protein skimmer, 404 Fluval, UGF with two 201 powerheads.

7 gallon tank with 6 pounds of live rock and countless brittlestars, 5 hermit crabs, snails and 1 False Percula Clown fish and Camel Back Dancing shrimp
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Old 05-19-2004, 06:19 AM   #4
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That is a lot of flow, I guess if the substrate stays put its OK
150 gal inwall reef tank, DIY everything except the tank and skimmer, MAG-24 return, 3 1200 Maxi-jets, Turboflotor 1000 Skimmer, 100qt Igloo Cooler sump.


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flow, water flow

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