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gnomey · 05-06-2008, 06:11 PM

If i know that the gh/kh of my local grocery stores RO water is gh 2 drops (35.8ppm)and kh 1 drop(17.9ppm), ph 6.0, can i pretty much figure that the TDS is low? or do i need to purchase a TDS tester?

i'm trying to (very) gradually switch my tank over to 40-50% RO as recommended by a nearby local blue ram breeder. my tap water is pretty high, gh 11 drops and kh 13, ph of 8.0

i tested mixing straight tap with 50% RO and got gh 5 drops, kh 6-7 drops, and ph 6.5

thanks ahead of time for enlightening me!

05-06-2008, 06:11 PM	#1 (permalink)
gnomey Algae Grower (View User Tanks) PTrader: (0) Join Date: Apr 2008 Location: USA Posts: 16	possible stupid question (TDS) If i know that the gh/kh of my local grocery stores RO water is gh 2 drops (35.8ppm)and kh 1 drop(17.9ppm), ph 6.0, can i pretty much figure that the TDS is low? or do i need to purchase a TDS tester? i'm trying to (very) gradually switch my tank over to 40-50% RO as recommended by a nearby local blue ram breeder. my tap water is pretty high, gh 11 drops and kh 13, ph of 8.0 i tested mixing straight tap with 50% RO and got gh 5 drops, kh 6-7 drops, and ph 6.5 thanks ahead of time for enlightening me!