AC 70 way to much flow - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 11-25-2012, 09:17 PM Thread Starter
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AC 70 way to much flow

I recently decided to get an aquaclear 70 for my 20 long, well it has so much flow that it is blowing up against the front glass, the flow is staying towards the top but this is way way to much flow, how should I diffuse the flow?

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post #2 of 11 (permalink) Old 11-25-2012, 09:19 PM
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Put it lengthwise instead if possible. Get's lots of flow throughout the whole tank.

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post #3 of 11 (permalink) Old 11-25-2012, 09:30 PM Thread Starter
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ya but my lighting would either get water on it or be way up front in the tank.

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post #4 of 11 (permalink) Old 11-25-2012, 09:40 PM
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make your own spraybar with larger holes?

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post #5 of 11 (permalink) Old 11-25-2012, 10:01 PM
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Ive seen people use a plastic bottle cut to make a little scoop so the water is defuse and sends some to either side.

I don't know where I'm going but I'm on my way.

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post #6 of 11 (permalink) Old 11-26-2012, 01:47 AM Thread Starter
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I think I fixed the problem, if I pull the intake up a little it reduces the flow.

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post #7 of 11 (permalink) Old 11-26-2012, 05:06 PM
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Pull the plastic piece out from on top of the impeller. You will see it has a semi-circle ridge that allows flow adjustment. The more centered the intake is over the impeller, the stronger the flow. The more it's off to the right, the slower the flow. Get a file or a dremel and cut down the ridge to allow the input tube to move further to the right.

A sponge pre-filter will also cut down flow and the flow will gradually decrease as the filter runs. Plastic bottle diffuser is also a nice trick.
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post #8 of 11 (permalink) Old 11-26-2012, 06:14 PM
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I always run my AC filters full blast, but just deflect the outflow by using a plastic bottle to make a baffle (you can find diys by googling "bottle filter baffle"). It's a pretty popular way to reduce the currents in betta tank, which is how I first found out about it. You can shove an AC sponge in the scoop part of the baffle to slow it even more. The largest filter I've done this on was an AC50, but I imagine it'd work on the bigger filters too.
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post #9 of 11 (permalink) Old 11-27-2012, 01:53 AM
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Swap the impeller for a smaller AC filter. The "motor" unit is the same for the 20/30/50/70.
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post #10 of 11 (permalink) Old 11-27-2012, 02:35 AM
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Quote:
Originally Posted by dbosman@msu.edu View Post
Swap the impeller for a smaller AC filter. The "motor" unit is the same for the 20/30/50/70.
I never knew this! Thank you so much for the info, now I can put ac 70 on a 10 gallon
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post #11 of 11 (permalink) Old 11-27-2012, 06:07 AM
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I'm actually having the same problem.its even worse tho because the flow is so strong is only keeping one side of the tank clean. The side that's not directly under the filter is just cover with debris.
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