I'm cheap, so I would reuse it. Plus you're going to a 75 gallon so you'll need less substrate that way. And you have all that beneficial bacteria. Little to no cycling depending on how fast you stock your tank.
What kind of algae are you battling?
Last edited by Darkblade48; 09-17-2017 at 07:55 AM.
Reason: Please use the edit function for back to back posts to keep threads cleaner