How much flow is too much?

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I just added a new power head @6000 lph I already have a 3000lph in there already. But now I'm worrying I have overdone it. It's a 48x24x18
What do you run for water movement?

fishface

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Reply #1

I wud say that shud be fine my 4x2x2 has a rw15 wavemaker which set on pulse mode on full blast which is 15000ltrs plus aanother powerhead 2500ltrs and i want more in there u cud add more i wud say

Scott Lawton

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Reply #2

Wow that is a serious amount of water movent! I didn't want to stress the fish fighting that all the time

fishface

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Reply #3

Mine swim against the rw15 and seem to enjoy it , its supposed to be good for them , i want to add another rw15
Or a jaebo crossflow

Scott Lawton

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Reply #4

The clowns are now actually swimming into the flow and zooming across the tank like it's a roller-coaster lol

Hai

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Reply #5

It depends on what corals you're keeping. For SPS, I plan to have the turnover rate to be at 60+


HK_Fuey

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Reply #6

I just added a new power head @6000 lph I already have a 3000lph in there already. But now I'm worrying I have overdone it. It's a 48x24x18
What do you run for water movement?
General guidelines are between 30-50 times DT volume.  Your tank is 340L less say 10% for rock and sand = 306L.  So 30x306=9,180 and 50*306=15,300

You currently have 6000+3000 = 9000, which is the minimum you want.  That's for soft corals.  SPS like higher flow.

However, these are old guideline, and people have found the new Jecod/Jebao powerheads and the gyres to be more powerful than traditional powerheads, so you may well get away with less if you have these.  If the sand is blowing about, you might have too much (but even then it can be the case with new sand.  Once it gets a coating of bacteria, it sticks a bit more, and that can stop).
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fr499y

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Reply #7

Mine works out at roughly 11200 lph on a 48" x 16" x 22"  :grin: I did end up removing a couple as it was close to 15000lph and sand/fish didn't like it rofl

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