I would suggest the following (using it myself...):So now trying to find cheaper additives for KH, CA and Mag.
Well, that would depend on your system's calcification rate. My corals use about 3dKH of alkalinity per week. With a total water volume of around 1000 litres, this results in approximately 12 teaspoons of baked bicarb and 130 grams of calcium chloride per week.When using the food grade bicarb, what would be the general dosing per 100L volume?
Hennie have you tried the carribsea range, I have been running my reactor on carribsea [cant remember the exact name] over the last few months and have been really happy with it so far. Only problem is it dissolves really quickly so have to keep topping up but is relativly cheap compared to other media. I mix the media with 10% of the Korroline magnesium and that maintains my mag levels very nicely at 3x calcium levels.I'm in the same boat - I used to run a calcium reactor filled with coral "rubble", but stopped this some time ago due to pollutants in the coral media. I'm currently looking for some good quality reactor media, but until then will continue to use DIY chemical additives.
For years now I have only been using Laboratory AR grade of any chemical I have used. The AR grade has very minimal contamination of impurities which are always listed on the bottle.
I find it very difficult to understand the amount of bi carb you use to maintain a dkh of +- 8. Do you use a calcium reactor?
I do a monthly dkh test and only have to dose 1-2 t/s per month for a dkh of + 9 I also use a calcium reactor which keeps thing up there even my carbonate hardness.
Perhaps you should try and use a laboratory grade bicarb it might make a differance
Hello HennieI agree, AR grade is guaranteed to contain certain tested limits of impurities. That is not to say that the CP grade is less pure, it's just not proven to be as pure...
Raising the dkh of a 1000 liters of water from 7.0 to 8.0 would require about 5 teaspoons of sodium bicarbonate, or 3 teaspoons of sodium carbonate. A healthy tank containing lots of growing hard corals could easily have a demand of 2 dkh per week, so an addition of 10-12 teaspoons of bicarb is not out of the ordinary.
I don't think the purity grade would make much differance to the "strength" of the bicarbonate - the water contained within the crystalline structure would - not sure if bicarb has crystalline water, though (CaCL2 has, and can be obtained as either anhidrous, di-hydrate or hepta-hydrate, if memory serves)... Chemical Gurus, HELP...