Empty 120g! What should i use it for?

[Spiny]

Pristine water for FW is pretty simple, buy a python and do 50% water changes weekly, that and put a couple of plants that's what I do and it's proven very effective so far.

[Ryan]

Thats not prisitne for Discus. To raise discus to get that perfect round you need to do 75-100% WCs daily or every other day. If you dont mind a little oval or dont need perfection then you can slack off a little.

Most breeders I see that are medium to large scale use a constant drip system that would change 75-100% every 24 hrs.