Kamoer F4 Pro doser used primarily for the big 3 additives. Selling together with DIYed containers for big 3 additives Will add in the remaining big 3 Redsea powders;2 boxes of alk, 1box of calcium, 1 box of magnesium Total 400 Deal @sembawang. Please WhatsApp 81885680 Sent from Singapore Reef Club mobile app