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Originally Posted by redchigh View Post
Dolomite gravel in a nylon bag in the filter or next to the filter outflow, would be safer. I have half a cup or less in the filter of my 115g, and it adds 2 dGH and maintains a stable pH of 6.0. In the other two tanks with no dolomite, and identical tap water, plants, light and maintenance, the pH is 5.0 and zero GH. So the dolomite works. I have maintained this for 12 years without any problems.
On the plants and carbonates, I mention this in the stickies. Some plants are better at assimilating carbon from carbonates than others, and these plants, like Vallisneria, do better in harder water for that reason. Other plants are not very good at this, particularly bog plants such as swords and some species of crypts, because these plants in nature live part of the year emersed and obtain carbon from CO2 in the air. Studies found that some plants such as mosses are basically unable to use carbonates as their source of carbon.
Byron Hosking, BMus, MA
Vancouver, BC, Canada
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]
Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
|c02 , calcium carbonate , kh and ph relationship , measuring co2 , ph buffer|
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