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Discussion Starter · #1 ·
I have been feeding co2 through the intake of my FX6 for about a month now. I understand the whole killing bacteria thing, but my fish have been just fine.

I am not entirely convinced that the co2 is being dissolved through my canister. I don't see a single micro bubble coming out of the outtake. I am worried that the co2 is building up in my canister and gets released in mass during it's auto-purge/prime periods.

I just installed a no-name ISTA drop checker and it displays blue.

Thoughts?
 

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Discussion Starter · #3 ·
Is it DIY? I don't have the skills or time. If someone can point me to a decently priced one that would be great. I've considered the in-line diffusers but they don't make them big enough for the fx5/fx6.
 

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I use a aqua medic 1000 co2 reactor. Works great for my 75G.
 

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I have been feeding co2 through the intake of my FX6 for about a month now. I understand the whole killing bacteria thing, but my fish have been just fine.

I am not entirely convinced that the co2 is being dissolved through my canister. I don't see a single micro bubble coming out of the outtake. I am worried that the co2 is building up in my canister and gets released in mass during it's auto-purge/prime periods.

I just installed a no-name ISTA drop checker and it displays blue.

Thoughts?
If the CO2 is getting mixed and dissolved in your canister you won't see any micro bubbles. A drop checker can take 2 to 3 hrs before you notice any change. What size tank and how many bps are you outputting? Are you using 4dkh solution in the drop checker? What actually occurs when your filter does the auto purge? How does it do it?

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The medic 1000 works good. but has small hose barbs, you would need to Kit bash the Hose barbs to make them larger to work with the Fx6 's 1 inch hose.

The other choice is Aquarium plants CarbonDoser EXT5000 with the large 5/8 barbs
 

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When the reactor or filter are doing the job right, you should not see bubbles. If there is no other reason to believe there is a problem other than the drop check, I would wait before changing things. Some things to think over? If there is much air or CO2 gathering at the top of the filter, it will be near the impeller and flow will stop or it will get noisy. Easy to miss getting the new drop check to show when you are not sure of it and the solution. A number of things might mislead you. Things like bad solution are common. It does take time for the color to change and it may just be not enough CO2 for it to change yet.
Sometimes we get nervous???
 

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mine is all diy got a 4 ft 3inch pvc pipe a t join for bottem and a reducer cap for top

it is on the return line water flows in the top with a barbed end and a few house clamps. down the 4foot pipe to a t connection with a samerreducer back to the tank. co2 is injected in the top via a drilled and added 1/8 spike glued in about 35-50 bucks to build and works like a champ
 
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