I am assuming that the defunct pool is subterranian.
If so, I would cover it with 6 mil plastic over a conventional truss system ( ie: "MM)that is sligthly elevated for rainwater drainoff to determine if glassing later is worth it,
also, with a truss framing, plastic could be removed and replaced with "shade cloth" for summer heat.
Also, a truss 'tent-like' structure at surface level would provide ease of installing ventilation at either end since heat rises to the highest point
If subterranian, you should have access to a drain pump to avoid accidental excess moisture that otherwise could lead to 'dampening-off', mildew, and fungus control issues.
Sorry to hear that I wasn't there at the time of the planting to supervise or participate - P.S.: that voids the "T I K warranty"
Yeah, it’s a concrete pool that’s about 50 years old, 6 feet at the deep end. Been reading stuff by a guy named David the Good (bonus: he’s published by a house that really, really ticks off liberals, so I giggle every time I buy one of his books) who says that a body of water in the greenhouse helps immensely with heat regulation. My dad lives with us and is pushing for aquaponics, so I’m tinkering with the notion of a fish pond in the 4-foot section and a greenhouse in the 6-foot.
In 2018.
Not this year.
Probably.
I think.