Yes you can go to the local petsmart and other various aquatic life stores and use the same pH down.

Or, use white vinagar for an organic version of pH down...just make it in small batches as the vinagar will allow the water to rise again in time.
HARDDON Reviewed by HARDDON on . Dumb Q. Where do I get Ph balace? I've read about it, 2 big nurseries I've been to don't carry it and one old lady lady looked at me like I was nuts! Where do I get ph up and down for my water? Is this the same stuff they sell in a fish store? Rating: 5