Filtration

[matthewg]

Hi Everyone,

I have a 20 gallon tank in cycle for my axolotls which I plan on purchasing within the next week. I currently use the marina s20 filter which comes with 4 different slots for cartridges. It comes with 4 cartridges and they're 2 different types: one contains carbon and the other contains zeolite. Do you guys recommend anything I can put in one of the slots that will help balance ph levels?

 

[matthewg]

Thank you for your reply. I will definitely look into buying them asap. Should I change it now while it's cycling?

 

[matthewg]

Thank You for you help!