These are a great value, especially if you feel the need to hand-raise your eggs/tads, or if a rival female keeps eating them! For my arboreal D. Imitators, I attach mine to the side of the glass near the mid-upper portion of my vertical tank and the mating pair soon investigates, usually with positive results. Of course, dimming the lights and misting the tank (along with Kenny G playing in the background) helps set the mood for them, but this really makes the mating ritual go faster and saves me the trouble of digging through every brom established in the tank to extract a couple of eggs!

Nice and small! I can fit it almost anywhere in my vivarium. Suction cup works great!

Was hesitant about buying these because I was afraid the suction would be quite weak. The suction is very strong and will only come off if you pull it off yourself.