Need low water change version of EI, med light , co2
I'm in a dorm so water changes are super inconvenient for me. Can someone point to me a good formula? I normally dose EI at home but here I'd prefer not to.
My subs is ADA AS.
I have on me KNO3, KHPO4, K2SO4, CSM +B, Ferrous gluconate, GH booster (CaSO4, K2SO4, MgSO4 mix).