do reverse flow signify a leak? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-22-2020, 08:25 AM Thread Starter
Algae Grower
 
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do reverse flow signify a leak?

I have a check valve on my co2 line but the water from the tank would still flow back when the co2 solenoid is shut off.

Does this mean, there's a leak somewhere?
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post #2 of 4 (permalink) Old 06-22-2020, 08:22 PM
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How far back are we talking here? Are you saying that water somehow gets past the check valve? Or is it simply flooding your diffuser?
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post #3 of 4 (permalink) Old 06-23-2020, 05:38 AM Thread Starter
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Quote:
Originally Posted by AndreyT View Post
How far back are we talking here? Are you saying that water somehow gets past the check valve? Or is it simply flooding your diffuser?

It never goes past the check valve which is quite far, just around 5 inches from the bubble counter. my diffuser reaches down to about 11" inside the tank. The back flow is about 10" total tube length is 66 inches.
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post #4 of 4 (permalink) Old 06-23-2020, 02:53 PM
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Quote:
Originally Posted by Kandomere View Post
It never goes past the check valve which is quite far, just around 5 inches from the bubble counter. my diffuser reaches down to about 11" inside the tank. The back flow is about 10" total tube length is 66 inches.

Seems fairly common.... at least in my opinion.
Some theories... co2 diffusing into water and replaced by it... co2 diffusing out of tubing creating minor vacuum..
Not sure of the exact physics but bottom line is don't be w/out forward pressure for too long.
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