Let me tell you about my new aquarium MVP - the TIESOME Acrylic Fish Shrimp Feeder. After struggling with food disappearing into gravel and dirtying my tank, this transparent feeding tube has been a revelation.
The acrylic material is surprisingly durable - I've accidentally bumped it several times while cleaning without any cracks. The transparency is perfect; it literally disappears in my planted tank when not in use. My cherry shrimp took about 3 days to discover it, but now they swarm the dish at feeding time like it's their favorite restaurant.
Assembly was straightforward (took me 2 minutes), though I agree with some reviewers that the screw connection could be slightly easier. The suction cups hold strong - even when my curious pleco bumps into it. The 25cm height works perfectly for my 20-gallon tank, though I'd recommend measuring your water depth before choosing between the 20cm or 25cm options.
Major pros: Keeps food contained (no more wasted pellets!), maintains water cleanliness, and allows me to monitor exactly how much my fish are eating. The removable dish makes cleaning a breeze - just pop it out and rinse.
Two minor drawbacks: The opening could be slightly wider for easier food loading (I use a folded piece of paper as a makeshift funnel). Also, as one reviewer noted, very small creatures like African dwarf frogs might get stuck in the tube if you're not careful.
After two months of daily use, I can confidently say this feeder has reduced my tank maintenance by at least 30%. For under $10, it's solved one of my biggest aquarium headaches. Just remember to choose the right size for your setup!