Gentle or strong flow for planted tank - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 12-25-2014, 08:46 PM Thread Starter
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Gentle or strong flow for planted tank

Anybody know the difference in growing plants between the two? Besides more flow more co2, less flow less co2 needed...A friend advised me today that too much flow in my tank was bad and that I'd do a lot better with gentle flow across the tank...I don't think so, but the opposite, so would like to get opinions...
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post #2 of 7 (permalink) Old 12-26-2014, 12:22 AM
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I generally like to shoot for 10x circulation rate in my tanks. (60G = 600GPH)


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post #3 of 7 (permalink) Old 12-26-2014, 12:29 AM
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It really depends on what's in the tank. Both plants and fish. They can tolerate both or one or the other. What I shoot for is a slight sway in the plant leaves. If the sway is gental here, there is a good chance the flow for the fish is fine as well.

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post #4 of 7 (permalink) Old 12-26-2014, 03:30 PM
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Too high flow damages the plants.
Some plants are OK with more, but some just get torn apart with too much.

I aim for at least a true 5x, but start with a goal of 10x. This is just going by the manufacturers ratings. I know they are exaggerating. I do feel I am getting at least 5x.
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post #5 of 7 (permalink) Old 12-26-2014, 04:29 PM
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Any thoughts on larger tanks? I'm converting a 135 from reef to planted. 950 gph return and two Vortech MP-40s might be a bit much! The return should still be sufficient (about 5-6x turnover through the sump after head loss), but I may need to adjust the nozzles to spread the flow more evenly and gently. Two 3/4 loc line returns are nice for the reef, but four 1/2" loc lines will give me more adjustment. The MP 40's will be removed.. together they are capable of an additional 15-50x turnover in the display which will be too much even dialed way back. I may go back to my MP-10 on lagoon to improve internal flow a bit with a more reasonable 200-1575 gph.
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post #6 of 7 (permalink) Old 12-28-2014, 06:18 AM Thread Starter
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Quote:
Originally Posted by Diana View Post
Too high flow damages the plants.
Some plants are OK with more, but some just get torn apart with too much.

I aim for at least a true 5x, but start with a goal of 10x. This is just going by the manufacturers ratings. I know they are exaggerating. I do feel I am getting at least 5x.
Thank you all for your replies. No harm no foul
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post #7 of 7 (permalink) Old 12-28-2014, 04:04 PM
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i've got a powerhead co2 diffusion setup and an external fluval 304, i have cross currents, the fish enjoy it, and the plants all get flow to them. havent seen any issues yet. lots of pearling all around
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