SSSOOOO oh wait one more thing Magnesium hardness is different than
calcium hardness. If your water is high in Magnesium but low in calcium, using
one of those tetra test kits will not tell you what component is making up the
hardness THUS you may be lacking in calcium even though your head is hard. :-).
THE ADDITION OF THE BLOCKS IS FOR THE CALCIUM.
Besides not being able to spell, remember lectures etc., it now appears 'e can't
read either. Quoting from my previous post:
"These were measurements that I made with a Tetra GH kit and the Wardley's GH
and Calcium specific kits"
Couldnt resist :-)
Chook laid another egg