Z
ZAX
Guest
Going out tomorrow to buy a new test kit. My kit was used and think it is expired. Which ones are recommended, so many at the store not sure which ones I really need. They have master kit, also phos, calcium, kh, copper, amm, nitrite,nitrate,ph, think a few others too, can't remember. The master test kit only checks 4 things i think. Suggestions?