I used to breed discus before plants took all my free time. First, there was an ion exchanger DI, made of cati and ani to purify the water. I still have HCl hydrochloric acid and NaOH sodium hydroxide at home. These were needed to regenerate the functionality of the DI. From this experience, I know how unsafe DI is to maintain and to drink.Art_Giacosa said:Edward,
I'm curious why you add CaCl and CaSO4.