Limestone in tank

[cbster]

I was reading on the internet that you should not use limestone in a planted tank. I have had it in my tank since day one and I was just wondering exactly what the limestone does and if I should take it out immediately?

[MikeO]

take it out, limestone will dissolve into the tank water. Limestone should not be used in any fish tank.

[carpguy]

It'll dissolve (slowly) into your tank, increasing your alkalinity and driving up your pH. If your not having a problem with it, I wouldn't worry about it.

Limestone is fine in a fish tank, especially if you want the additional alkalinity. If you don't, it may cause problems. If its causing problems, yank it.