going from salt to fresh water

[joe-dirt]

I got a 75 gallon salt water tank from a friend and want to use it for a fresh water oscar tank what can i re use some of the things in it . Can i reuse the sand if it is washed good and what about the rocks he had in it the tank sit empty for about a year. all the rocks were removed and sit out to dry for about a year.

 

[Sombunya]

Personally I disinfect with Sodium Hypochlorite, also known as swimming pool chlorine. If you use Chlorox or a laundry bleach then double the amount below.

I think about 1/3 of a gallon in your 75 gallon tank will give you a 500 ppm concentration, plenty to disinfect it well. Add the substrate, rocks and anything else you want disinfected and let it sit for three hours. Nothing will live through that treatment. Then rinse it well and de-chlor it with PRIME or something equivalent. Residual salt is not an issue.

 

[joe-dirt]

thanks for the advice will do that this evening