The globe in my Ultra Zonic UV sterilizer is now a few years old and past its use by date. I am not sure which size it is but the total length is a bit over 1 foot long. Any idea what wattage it would be? Otherwise if I do get a new unit to plug into the outlet of my canister filter, what brand and size would you recommend? I lose water when I try to remove the globe from my Ultra Zonic unit, are any able to replace the bulb without losing water?