[Thomas Bertilsson]

It's fine for a few days but the photoflo will start growing algae after a bit. I make up about 1L, use it for a session (10 rolls?) and toss it.

That's what I do too, and the same bottle of wetting agent has lasted for years, so the per film cost is ridiculously low.

Some wash aids have alcohol in them, like Sprint End Run. I should mix some of that and see how long before stuff starts to grow in it.