Aquatic Plant Central - View Single Post - [Wet Thumb Forum]-Calcium dosing to increase GH

Seattle_Aquarist · 04-13-2009, 08:06 AM

Hi CraigThor,

I use CaCl2 for my tanks and have no problems. I know some people have expressed concern about the chloride being a problem for the fish or plants, but I have not experienced any problems using it.

I tried CaSO4 and CaCl2 and found I liked CaCl2 better because it dissolves clear while CaSO4 was "milky". One warning if using CaCl2, the chemical reaction with water is quite strong and generates heat. Add the CaCl2 to water, do not add add water to CaCl2; and do not be surprised if the glass you are mixing it in becomes warm. I would not add CaCl2 directly into my tank for fear the fish might try to eat the crystals before they dissolved.

04-13-2009, 08:06 AM	#42 (permalink)
Seattle_Aquarist Senior Member Join Date: Mar 2008 Location: Seattle, WA Posts: 1,275 iTrader Ratings: 7 iTrader Positive Rating: 100% Plant Points: 69000	Re: [Wet Thumb Forum]-Calcium dosing to increase GH Hi CraigThor, I use CaCl2 for my tanks and have no problems. I know some people have expressed concern about the chloride being a problem for the fish or plants, but I have not experienced any problems using it. I tried CaSO4 and CaCl2 and found I liked CaCl2 better because it dissolves clear while CaSO4 was "milky". One warning if using CaCl2, the chemical reaction with water is quite strong and generates heat. Add the CaCl2 to water, do not add add water to CaCl2; and do not be surprised if the glass you are mixing it in becomes warm. I would not add CaCl2 directly into my tank for fear the fish might try to eat the crystals before they dissolved.