Fit TMC O rings around your unit's glass sleeves to prevent water leaks.
Ensure you use the correct size O rings to create effective seals.
1 pair at 29mm diameter and 4mm thickness (pond clear 15 and 25, pro clear & ultima 30w & 55w, 110w pro pond)
1 pair at 29.5mm diameter and 3mm thickness (pro clear advantage UV30 & UV55 & Pro clear ultra 55)
