Ok, so after a year of not having a tank im jumping back into it. My old tank one of the tedious tasks where to dose every day (two part). But this tank im wanting to go the rout of kalk and a cal rex. Could some one please explain this method of dosing more? I understand the basics of the cal rex raises the Cal in the tank and lowers the ph a bit and the kalk is to keep the ph at the level's you want. Is there more to it and how hard is it to get everything tuned. Is this a couple hour project or is this a week long event of constant monitoring. Also what is put into the kalk rex?