http://web.archive.org/web/200010171320 ... efault.asp
http://www.advancedaquarist.com/issues/ ... 4/chem.htm
Ok...So people who are going to be using this system like myself, please be aware that you need to buffer with Baking soda, (From the super market) to raise your KH level. Supermarket baking soda, (Sodium Bicarbonate) is more refined than technical grades as it is for human consumption.
Using this system also requires epsom salts.
Decent water changes are also required, but we all know that anyway!
you can either read the www links that WASP supplied, (ABOVE), or simply mix one part epsom salt with 10 parts of magnesium chloride, (DRY) and then add approx. 3 small cups to five litres of water in a pump bottle or similar.
approximately 5 or 6 desertspoons of this mixed liquid will raise Magnesium levels by about 30-40 PPM for every 300 litres.
This is a guide only, you will have to esablish the exact amount yourself.
3 cups Calcium Chloride to a five litre bottle works out about the same as magnesium, (5 or 6 desertspoons = a bit less, 30-35 PPM per 300 litres).
I add the above as follows:
1: every Sunday I check my levels.
2: Calcium is generally around 380-400
4: I add enough premixed calcium liquid to up my levels to around 450
5: I do the same with magnesium. (It is normally around 1200, I bring it up to 1350.
6: I add enough baking soda to bring KH up to 10-12. (1 heaped teaspoon adds about 2 KH to every 300 litres)
I simply dump the contents straight into my sump one after the other.
This does not shock the system if done weekly. If longer periods are evident I suggest adding them over a couple of days.
PLEASE NOTE: this is a guide only, and the levels i maintain may not suit your requirements.
Any other questions please ask.
Cheers
Craig