Is cement aquarium safe

[fhawk362]

Id like to make an artificial coral rock for my new salt tank to add some hiding places for the fish but I was wondering if cement will have any adverse effects on the water parameters and if so is there any way to prevent this

 

[Calamity]

It will raise the ph of your water. Soak the cement in water until the ph readings are normal (could take a while) then it should be safe to add into your tank.

 

[fhawk362]

How long should it soak for normally?

 

[deeda]

It depends on how much cement you use. Just keep checking the pH of the water after doing multiple water changes. I'd recommend doing this in a separate tub of water.