How cold of water can she handle?

What's good y'all? I have a question about water temps., not so much what the ideal range is, I understand it's somewhere between 62* and 72* F. My question is, how cold of water will the little girls handle.

The situation for the question: Plannin' on doing an outdoor, I understand it's late in the year, especially as Fla is concerned. There are some waterways around that I have a set-up I'm fixin' to place out. Interesting method, will take pictures and post once I set-up. Anyway, I'm expecting by time harvest come around, the water may be in the low 40's. If plants can handle air temps at 38*, even in soil, the soil heat is probably only around 45 F. Then the root zone of a hydro should be able to handle that low I'd assume. I do understand that there isn't the soil buffer, but what do y'all experts think? Thanks!

BSG

I don't think I would try it, if you are expecting the water to be that cold. That would really shock the roots as soon as you started pouring.
The plants themselves could take a few nights in the 40's, and even light frost, but they say mulch, water, or something to keep the roots warm when expecting frost.
Personally, I would plan on hoofing water in. (sounds as though you're doing a guerilla?)

Thanks for the quick response. Yes it is guerilla. She won't be in soil though. I am going to have it floating in the pond on a styrofoam raft. Disguised of course. Also, the pond is blanketed with vegetation, so the cover is good. I'm expecting the water to stay pretty warm since it's; fairly shallow, black muck, and also completely covered, so not much upward heat loss. Now it will be a steady hardening off process, as the water temp. won't dramatically drop, it will merely cascade as the season moves in.

Bump, would really like some knowledge on this, thanks!

That makes sense about the mixing of particles with hot> cold water. The water temp. is in the 70's right now, will probably give it a shot anyway. Experimenting never hurt anything!