KH and GH

[Lakerfan24]

What ppm amounts of KH and GH are appropriate for a 40 gallon aquarium?

 

[FishEggs]

Mostly depends on what fish you want to keep. Test it to see what you have and work from there. Most fish are able to acclimate to your water, they just might not breed.

What are you interested in keeping?

 

[Lakerfan24]

Loach catfish rainbow shark pleco and angelfish

 

[Lakerfan24]

I'm upgrading my aquarium by the way