Let's see... I don't know but I guess that bringing the solution up to a pH in the 7 - 8 range would be ok. That'll take a lot of water... Do you happen to have alot of water just laying around in your yard?

Seriously though - I'd just do as mas985 suggests and use it in the pool. As I understand most SWCG pools require regular additions of acid to combat pH rise. I doubt the amount of calcium on the plates would even be noticeable in the pool.