We've got the answer! GHL Maxi Doser!
Tired of doing water changes? Take a look at the GHL Maxi Doser and set up your automatic water changer!
GHL Dosers:
https://pafish.me/GHLdosing
Seachem HydroTotes:
https://pafish.me/HydroTotes
https://www.youtube.com/watch?v=oHeD...zdk0k1w03c010c