If you are unhappy with these choices citric acid can be used.
Many in the hobby use in powdered form to generate CO2.
It is another very weak acid like acetic acid.
Solubility is about 145g/100ml, not sure of resulting solution in ppm.
Products labeled as "cleaner" could be something to stay away from.
Typical cleaners contain fragrance, tackifiers, coagulants, color changeling dyes, vehicle additives to prevent splash etc...
These extra additives may leave residue of sorts not easily removed.
Unscented ammonia is used by many to cycle aquaria.
Not good at removing calcium deposits though.
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Growing is not that difficult.
Last edited by Darkblade48; 10-09-2015 at 03:02 AM.
Reason: Please use the edit function for back to back posts