Replacement Suction Cups for Aquarium Heaters — 35 mm diameter, 5 cm clamp Key benefits Strong hold: High-suction design keeps your aquarium heater firmly in place so it does not fall or shift during normal use. Reliable and long-lasting: Made from durable resin that resists wear and provides extended service life, reducing the need for frequent replacements. Simple and secure installation: Attach the cup to the heater, press it against the tank wall, and the heater stays put without complicated tools or procedures. Broad compatibility: Designed to fit most standard aquarium heaters; use to replace worn cups or add extra support where needed. Features and specifications Material: Resin (Kunstharz) for durability and wear resistance. Diameter: 35 mm. Clamp size: 5 cm. Function: Suction attachment to hold aquarium heaters against tank walls for stable placement and operation. How this solves common problems Prevents heater drops and shifting that can interrupt temperature control or risk damage to the heater and aquarium. Replaces brittle or ineffective original suction cups with a more durable option. Keeps heater positioned for consistent temperature distribution and safer aquarium operation. Practical use scenarios Replacement: Swap out old, cracked or weak suction cups on a standard aquarium heater to restore secure mounting. Maintenance and repositioning: Temporarily remove and reattach a heater during tank cleaning, then quickly secure it in the correct position without fuss. Strong-current or planted tanks: Add or replace suction cups to maintain heater position where water flow or decor might otherwise cause movement. What to expect Easy, tool-free attachment: Slide the clamp onto the heater, press the suction cup firmly against the tank wall, and check the seal. Durable performance: Resin construction provides resistance to wear so the suction cups remain effective over time. Compatibility with most standard heaters: Intended for general use with common aquarium heater designs. Note: Matches original heater mounting method—attach to heater and press to tank wall.