This conditioner come in the a turtle shaped white block and is very simple to use. Just drop it in the aquarium or terrarium and it dissolves. The purpose is to neurtralize acid water. The calcium aids in the prevention of shell softness in turtles. I put two blocks in my 15 gallon terrarium after I change the water and it starts working right away in clearing and neutralizing the water.

Pros: Very easy to use

Cons: Make sure you buy plenty

Dissolves quite quickly and lasts for quite a while also. I buy one of these everytime I change the water in his tank. Lol sometimes he goes over and sniffs it and tries to eat it. But he never does.

Pros: Has the right minerals for safe water

Cons: n/a

I love these, they look good, disolve quickly and keep my tank in good shape until I have to clean it.

Pros: easy to use

Cons: none