kalkwasser calcium supplements

[zlin0524]

which one should i use ?http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=4747

http://www.bulkreefsupply.com/store...lkwasser-calcium-hydroxide-for-aquariums.html

 

[lfsmarineguy]

Calcium Hydroxide is pretty much the same regardless of where you get it. Just make sure you dose it properly or you'll end up killing stuff.