Bought this on a whim; matches color, fits all 5 nutrient bottles perfectly; magnet strong enough to hold weight.
LokRoad Magnetic Storage Shelf Refrigerator Spice Rack Kitchen Organizer Single Tier Magnetic Fridge Spice Storage Basket, White
AMAZON/
I can’t open this on Amazon 
I think its this one.
https://www.amazon.com/dp/B07QW2NB9X/ref=cm_sw_r_cp_apa_i_2-NcFbB6PYPA3
Thanks I’ll try this one 
Could you tell me the size of rack you bought? I ordered one from Amazon and it dont fit.
This is the one I bought. There’s only 1 size.
https://www.amazon.com/dp/B07QW2NB9X/ref=cm_sw_r_cp_apa_i_2-NcFbB6PYPA3
Fit? Are you trying to put it inside the grobo?
Yes inside
The Grobo is 14" x 14" so if you wanna put it on one of the walls make sure the width of the shelf you prefer next is less than that.
The one posted above by @SuperDelic would fit on the walls inside. I don’t think they would fit as a replacement for Grobo’s shelf though if that’s what you’re aiming for.
Okay thanks 
I’m thinking of having my cargiver use an elastic cord when she works again
Are the bottles falling over?
Yes they are
Seeing the new design when my grobo arrived, that’s been a concern of mine, though I haven’t had a chance to start using it yet. That’s a good idea though, perhaps a small bungee cord across the front of them would do the trick!
I have been using a stretchable cord with a couple of magnets on each side for a few months and it works good
