Fish Tank Siphon and Gravel Vacuum 

I purchased an Electric Siphon/Gravel Cleaner for my Fish Tank from Ebay. I thought I'd film my experience with it, from trying to put it together to draining out water and finally what I bought it for - to vacuum the fish poo and clean the substrate. It took a lot of fiddling around but it worked in the end. It was overall a bit disappointing as a gravel vacuum. I have a sand substrate with fine particles - it might work better with a more coarse substrate that's heavier than the waste. I might also try it with mesh bag to catch the waste.
08/09/2021 I've given up using this and would recommended not buying this.