How important is flow - for plants and fish? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 12-23-2014, 12:51 AM Thread Starter
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How important is flow - for plants and fish?

Hi guys,

I have a 90P running an Eheim 2217 and an Eheim Skim350 (small powerhead). It's pretty strong because I'm using the nozzle, not the spraybar. But it's not the speed of the flow I'm concerned about, it's the placement and volume that I could use more of as my tank still has a 20-30% deadspot.

How important is flow to the health of plants and fish? I'm running high-tech, heavily planted.
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post #2 of 5 (permalink) Old 12-23-2014, 01:22 AM
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Flow is important, no doubt. It's a tank's pulse. That said, people generally overthink it. Even dead spots are rarely truly dead spots - just a lot slower. If your plants are happy, I don't think there is a reason to add more pumps.


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post #3 of 5 (permalink) Old 12-23-2014, 01:24 AM
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Good flow means the good things in the water are being brought to the plants continually. CO2, ferts. It also means the wastes are getting carried away.

Poor flow near the bottom allows debris to accumulate. It decomposes, and can encourage bacteria or fungi that may not be good for the tank. Debris can get so deep it buries the plants. (yea, I know, this is extreme).
Good flow keeps the debris in motion, suspended in the water until it is carried near enough to the filter intakes to get removed.

I also have problems with the Eheims. Way under powered.
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post #4 of 5 (permalink) Old 12-23-2014, 03:27 AM
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Quote:
Originally Posted by Diana View Post
I also have problems with the Eheims. Way under powered.
Generations of stunning Eheim-powered tanks disagree with this statement.


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post #5 of 5 (permalink) Old 12-23-2014, 04:00 AM
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While EHEIMS may not produce the strongest flow they are however great filters. I like to use powerheads in addition.


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