Join Date: Jun 2014
Location: Cape Coral, Florida
+1 What Greaser84 said.
A good starting point for baking soda is for 10 gallons you need about a gram per dKH. Adjust as needed after testing (after mixing for several hours to aerate). As a more realistic amount, say you are changing 15 gallons at a time, it takes about 1 teaspoon to get a dKH of about 4.
So if you are trying for low PH (i.e. low dKH), and have a small tank, it is VERY LITTLE. But not zero.
I'd also agree with just mixing RO water straight the first time, BUT the first time match your tank parameters, and if you want to change do it slowly over several water changes.
Despite indications otherwise, the Equilibrium does have some impact on dKH, so if you are going for a fairly high dGH, expect to even use a bit less baking soda. But not zero!
Bump: pS. Sorry, Diana and I were writing at the same time, hope it's similar! If not listen to her.
Bump: Incidentally this may be completely obvious but just in case: Mix water for water changes. Use RO water straight for top off due to evaporation. This keeps you from building up dissolved solids due to evaporation.
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