Hello all! First post here. I have finally started getting into pressurized co2 for my 75 gallon tank.I have purchased my system from green leaf aquariums and now I am looking at my diffuser options. I am not really on a budget and just want something that is efficient and is reliable.i have two aquaclear hob 110s running and therefore inline diffusers are not an option for me. I've also heard mixed results running the line directly into the intake tube. I dont want to ruin the filters or my bacteria colony if that is actually what could happen. I was thinking of using the Hagan mini elite option and running it below the output of one of the filters but not sure if that would spread the bubbles enough across the tank? Any advice or suggestions would be much appreciated. Thanks!
Not something I've tried but some general thoughts, perhaps?
I think running the CO2 into the intake on HOB will be a different situation than we might find on doing it with a canister. In the canister, I find we may form a bubble of CO2 at the top around the impeller and could run the risk of running it dry to ruin/damage the impeller. But in HOB, I see little chance of this as the impeller is set at the bottom and any large bubble will go up and away, so I would not worry that point.
The bacteria idea seems a bit overworked as it would be my guess that the bacteria would only die if deprived of O2 for a long period and adding CO2 does not remove O2, just change the percentages. I see bacteria being much the same as humans in this area. CO2 is not a poison (NOT CO!) but we do suffer if the CO2 gets so strong that we don't get enough O2 and that is really hard to do in a tank that is open at the top and water moving all around to do the gas exchange. I might think the larger question to be one of how much that gas exchange would lose more CO2 but not enough expense for me to worry the issue as gas is super cheap. Buying the equipment is the big bite!
I tried to test how CO2 moved around a ten, twenty, and seventy five and was not able to pick up any reliable difference in the PH, using a modified PH pen to take readings. There may have been differences that I could not pick up but then I came around to thinking that any differences in the ESTIMATED ideal of 30 PPM was not really something for me to work too hard to make exact. Exact estimates are no longer part of my worry stream!
As I see no danger in this, I might try a simple setup of just fitting a tube into the intake, adding a tee in the CO2 line to go to the second also seems reasonable. If the intake has a strainer, perhaps just mashing the tube in the slots to hold would give a chance to see how it works?
I'm into watch, learn and adapt as needed, certainly if it tends to save me time, money, and thinking too hard!