CO2 ceramic disk size?

[Fishguy]

For a in tank co2 diffuser  what should the size of the ceramic disk be i will use it on a 20 gal high

 

[Mmiller2001]

Shouldn't matter too much. Circulating the co2 around the tank is where I would focus.

[Seattle_Aquarist]

On 10/29/2022 at 1:43 PM, Fishguy said:

For a in tank co2 diffuser  what should the size of the ceramic disk be i will use it on a 20 gal high

 

For my 20 gallon I use an 20 mm disc diffuser. +1 for @Mmiller2001 comment - good water circulation is important to distribute the CO2 evenly throughout the tank.  -Roy