Sharon, Belle is a lovely colour, and just glows!
Although it looks in that photo as though Robin's carrying the eggs, lol.
Boy, this is exciting even at second-hand!
Are the houseplants safe for a fry bin, is one thing I'd be wondering, if I were you - and I wish I were, how exciting!
(Not that I'd trade my bettas for even Robin, but as I believe he's a Canadian citizen, I do entertain some faint hope of one of his offspring down the road without having to pray for a largish lottery win and a reliable importer.)
The potting soil may contain chemical fertilizers, though, if they are regular houseplants, and peat moss used in these often contains wetting agents, things that could harm your fish.
Now, of course, you'll tell me they're plastic, lol.
Netty, would several of those bins do for grow-out, if she split up the fry?
I know it's hard to tell, as a spawn may produce anywhere from no to hundreds of fry...
But if those are like the similar-looking storage containers I have, they're actually pretty good for emergency fish-keeping.
Don't many people make do with a 30 or 40 gallon grow-out?
Although one would need additional sponge filters, heaters and things for multiple smaller containers.
The advantage being of course that these containers can be placed on different, smaller surfaces, rather than having to worry about space, floorboards, a stand and whatnot.
Pretty scary, going into one's first spawn, and I think if it was I, I'd need physical support, never mind all else.
At least Sharon's got plenty of time, as she won't be back until early December, to start conditioning the lucky couple, and get organized.
And lord knows she has access to the best and most expert advice...
So, whatcha figger?