Join Date: Jul 2016
Location: Ontario, Canada
is adding baking soda to raise KH safe?
I currently live in an apartment that has only access to softened water. the softened water is way too high in sodium and I know it kills terrestrial plants. (I know this from my home gardening and my grow tent)
my girlfriend has started a high tech planted tank (and I am helping) and I knew softened tap water is probably not the best.
as a result, to make aquarium water I have been using RO water and Seacham Equilibrium to adjust the water hardness.
the ph is good (around 7) but because the kh is so low (1 or 2 I think, based on the test kit) the co2 causes a marked drop in ph when it comes on and there is no fish and invertebrates yet!
I am concerned that once the bio load gets to the tank in earnest, the acidity of nitrates may cause serious ph drop.
I have been looking for a way to increase KH and I have read that baking soda (sodium bicarbonate) can raise kh safely for aquarium. however, I am concerned that the sodium ions would destroy plants.
Does anyone have experience adding baking soda to high tech planted tank?
PS: I looked at Seacham's alkaline buffer, but all it says is that it is phosphate free, it doesn't say what compound it is. for all I know it could be expensive baking soda