Not used yet. I'll update when I get my tank up, but I have the smaller 5w version and it's tiny. This 15w version is surprisingly big, just surprisingly big, but I still like the flat design as it blends more into the background, but I'll have to see how it fares in the aquarium if I have it because of the size get. I'm sure the heating function is good, 5 watts heats my 6.5 gallons relatively easily, never goes out of range and hits 81 during the day but never or very rarely reaches or exceeds 82. that's 5 watts in 6 gallons . So I can imagine that 15 watts in 10 gallons would be a strong motor. I will update. Ps. I place my heater near the filter inlet for better heat distribution and less chance of hot spots with constant flow. Maybe this helps!
YukiHalu Mini Submersible Aquarium Heater With Thermometer And Temperature Controller - 25W, 50W, 100W, Or 200W Options For 5-40 Gallon Fish Tanks
25 Review
Hardy Leaf Black Forest Asian Java Fern Potted Live Water Aquatic Aquarium Plants For Freshwater Fish Tank By Greenpro Microsorum Pteropus
39 Review
Convector Electrolux ECH/T-2000 M, white
21 Review
🐠 Fluval E300 Electronic Heater - 300W Advanced Aquarium Heater for Tanks up to 100 Gallons (A774)
9 Review
🐠 U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review