Fish "stuff" (Morley DE21)

From when we had a fish, apologies, I'm not going to empty everything in the tub out but there's a canister filter with inline UV lamp. At least one glass cleaning scrubber thing (although an army of snails is less effort and more fun!).
There's a battery operated vac and water quality testing kit.
There'll be a few other bits and bobs.
Please indicate why this will be useful and when you'd be able to collect.