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Re: Aquatic Plants Digest V3 #938

In a message dated 3/30/99 1:02:25 AM Pacific Standard Time, 
Aquatic-Plants-Owner at actwin_com writes:

<< CarlaThorn at aol_com writes:
 >Could anyone tell me why co2 injection in a 55-gallon tank would have
 >practically no effect on the ph or plant growth? ...The only surface
 >turbulence comes from the two biowheels, but it's hardly a ripple.
 >No matter.  Those guys are the thing.  I set up biowheels when I first
 >started with CO2 and observed the same thing you did.  I turned them off
 >and presto, I'm in business.
 >						- Steve >>

Yep, you guys are correct. The biowheels were the culprit. With them turned 
off, the ph dropped nicely. Now....how does one keep the tank evenly heated 
when water isn't circulating (this is assuming I don't replace the biowheels 
with another method of filtration, choosing to let the plants control 
ammonia)? I found that in the few hours they wheels were off, the temperature 
in the corner of my tank where the thermometer sits dropped about 7 degrees, 
even after I turned the heater (situated in the middle of the tank, against 
the back) up. I'd think the different temperatures throughout the tank would 
be rather stressful for the fish and the plants...