GimCat Hydro-Grass - cat supplements

It grew straight away but the cats have shown little interest - my houseplants are obviously more tasty!

I used to order this grass regularly for the past few years. However, the last few packs have been noticeably worse than before. The grass doesn’t grow, there’s less hydrogel in the mix, it gets mouldy faster, and fungus gnats have appeared in it. I don’t have any plants in my flat so I’m worried the gnat larvae were already in the mix. Only a few blades of grass grow from the pack and the cats don’t want to chew it. They used to love it before.