i am a tropical fish breeder so i am very familiar with this subject. i have a 4 stage ro/di unit for my fish/plants. this gives me water that has a ph of 6.0 and a tds of 0-2. i will assume that the tds of distilled water hass the same or close tds and i cannot ad any ph down to my 0-2 tds water without dropping the ph so low that it doesn't even register on my chemical ph test kit which has a low range of 4.0.
justaseed Reviewed by justaseed on . Anybody with pH utensils do me a solid! Hey my pH meter's in the mail on the mail but I wanna get started on my new grow (see grow log), but I do have a gallon of distilled water (which I'm going to put into a sprayer/mister) and some pH down. How many drops/mL of General Hydroponics pH down do I need to put in a half gallon of distilled water to get to 5.5 (around what you should be doing for propagation correct?) Thank you! Rating: 5