05-05-2010, 01:33 AM
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Originally Posted by Mikaila31
Muriatic acid acid is a trade name for HCl or hydrochloric acid. So...... NO is the answer. Your pool would not be good for discus even minus the temp and chlorine. On contact with water HCl breaks into H+ and Cl- and messes with the waters buffer ability. The moment you add dechlorinator your going straight back to where you started. You add Muriatic acid to a tank you are going to be adding chlorine ions. Your pool probably tested a smig higher on chlorine after you dumped that gallon in. On top of that it is going to act as a buffer. The chlorine as you know gasses out over time, which is why you always got to keep adding it to pools and spas. As it gases out the water will creep back towards it's original pH and hardness. Ph decrease because it is based on acid/base levels, so of course if you add a gallon of acid your pH is going to go acidic. Hardness is controlled a lot by basic compounds, these react happily with the acid turning them into a new compound. These are all in equilibrium with each other. As you lose chlorine everything will start shifting back towards the original equilibrium, breaking apart to reform original compounds. As this happens your pH goes more basic. Things "swing" in a sense, which is why buffers(on top of this one being an acid and chlorine) are not wanted. You achieve nice water by doing that, but it is not stable or fish safe by any means.
I agree ,those who reported using this acid reported pH swings after 12 to 24 hours depending on KH of water used, and reported using quite a bit of the acid to maintain desired levels. Is why I suggested checking results after 24 hours ,and also seperate container.
I would consider CO2 injection if plants are to be placed in the tank, R/O tapwater mix,or Peat in the filter for lowering the pH, KH.
Also believe adding acid might increase conductivity or (total dissolved solids) which discus aren't fond of.
Last edited by iamntbatman; 05-05-2010 at 04:26 AM..
Reason: Fixed the quote