Looking to fix a broken ballast on your JBJ Nanocube?
Check the ballast first on the units that contain fuses to see if there is a blown fuse on your JBJ original ballast. If it is OK then it is either the bulb that needs replacing or the unit itself in most cases.
We are a Dealer/Reseller of the Transworld Aquatics Line of JBJ Products. For warranty information please contact us and we will fwd you to the correct place. Most of their products carry at least a 1 year warranty.