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The Alert Combo™ pack combines Ammonia Alert® (1 card) and pH Alert® (1 card)
No test kits
Place it horizontally or vertically near the water intake or the way where water flows
In other words
Hole Stone Qty:5lbs The Alert Combo™ pack combinesHole stone is a fascinating and unique rock. It gets its name from the numerous holes and cavities that are present throughout the rock, creating a unique and naturalistic appearance. The rock is a type of limestone that forms through a process of precipitation from groundwater that contains dissolved minerals. Over time, the minerals form into layers that compress and harden to create a solid rock. The holes and cavities in the rock are formed when