Let me start by saying this little acrylic ring has been a game-changer for my tank setup. As someone with a mix of goldfish and a sneaky turtle, the struggle was real watching my turtle hog all the food. This feeder creates a peaceful dining zone where my goldfish can eat without competition.

The adjustable design is brilliant - it fits perfectly in my 15-gallon tank (though heads up, it's way too big for nano tanks under 10 gallons). I love how it keeps flakes contained instead of scattering everywhere. My water quality has noticeably improved since using it.

Now about that infamous suction cup - here's the trick everyone misses: You MUST remove the pointless plastic cover first (seriously, why is that even there?), press the bare suction cup firmly to the glass, THEN screw on the feeder. Done right, mine stays put for days. But if your water level drops too low or you have aggressive fish bumping into it constantly, you might need to reattach occasionally.

One unexpected bonus? My betta has claimed it as his personal sleeping pod after feeding time! Just tilt it sideways and voila - instant betta hammock. Though fair warning: turtles and some fish take time to learn they need to approach from underneath - a colored indicator strip would make this perfect.

While not flawless (I wish the manufacturer would ditch that useless plastic cover), when used correctly this $5 gadget solves so many feeding problems. Just monitor your water level and teach your aquatic pets how to use it properly.