The picture of this feeder is a bit deceptive. I was under the impression that it has a programmable timer because it shows what looks like a timer on the page. It turns out this is just an image of a clock printed on it near the lights. Indicator lights indicate how many times per day the feeder should feed into the tank. When you put batteries, you need to choose one, two or three times a day. The time you set is the feeding time. So if you want your fish to eat at 5pm, you need to set them to 5pm. If you decide to feed twice a day at 5:00 p.m., he will feed once at 5:00 p.m. and the second feeding will be 8 hours after that. I wasn't trying to set thrice a day. I like its size as it is not too big and fits under the hood of my tank. I haven't tried it with a catenary connected, so I can't comment on that. Cheaper than the PetSmart and probably worth the low price, but I prefer one that lets you actually set the time. If I forgot to set the correct feeding time and I had to go on vacation, my fish would just have to get used to the new feeding time while I was away.
PAWISE Automatic Pet Feeder With Timer For Cats And Dogs - 1 Meal Auto Dog Dry Food Dispenser
42 Review
Rabbit Food And Water Dispenser Set - Perfect For Ferrets, Cats, Birds - Small Animal Food Bowl For Rabbits - Ideal For Use In Cages - Oncpcare
15 Review
π± HBN Automatic Cat Feeder: HD 1080P Camera, Alexa Compatible, Wi-Fi App Control!
17 Review
Feeding Your Aquatic Pets Made Easy With Our Multi-Function Fish Feeder Ring Set
14 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review