This has been one of those weekends that reminds you why this hobby is so difficult - always something going wrong and surprises in the tank unless you're constantly doing preventative maintenance. Our UV Filter's ballast exploded due to salt water leakage.
I upgraded our Jebao DC-9000 return pump to the brand new DCS-12000 series of pumps, which are supposed to be quieter and more efficient. I'm running dual 3/4" return lines through a single 1" return line, which creates more head pressure. I'm hoping this pump will be quieter while providing more flow.
I decided to replace the bulb in my UV filter (Coralife 36w TurboTwist). We've had a lot more cyano and bubble algae since we left the tank on it's own for 16 days in August. There was a slow leak in the quartz sleeve of the UV filter, which had allowed saltwater to build up - the salt creep blocked most of the UV and when I moved it, it sloshed into the ballast fixture and shorted it out - blowing a hole in the fixture. No one wants to smell electrical smoke when you open up a filter. So the UV was dieing and is now totally dead. Replacement ballast is $100, I paid $100 for the whole filter. New one is $160. Tough call. I found that Jebao makes a 36w UV selling for $75, so I'll give that a try. If anyone wants some free Coralife 36w UV bulbs, let me know.
The tank is doing well other than encroaching cyano now that the UV is totally dead. I gave in and dosed Boyd Chemiclean today, which I've been reluctant to do - having read some good and some bad experiences from folks with mixed reefs. I dosed 60 gallons worth of product, guessing our actual water volume is about 80 gal in display/sump (120 - rocks/coral/etc) and rounding down for safety. I turned off the carbon/GFO reactors and the UV is toast. I removed the skimmer cup and opened the wastegate fully, but left it on - hoping to aerate the water as much as possible.
Everything looks good so far, other than some microbubbles from the skimmer going crazy. It's overflowing even on the lowest setting, but just over the neck without a collection cup. Everything in the tank seems OK so far, even the acros have polyp extension. I'm cautiously optimistic. Instructions say to let it go for 48 hours, but I may only do 24 and do a water change tomorrow.
I currently run two MP10s from my original two nano tanks in this tank. I bought an MP40 for cheap a while back and I'm planning to get a second one and replace the two MP10s with two MP40s - since I run the MP10s at full power and the glass is thicker than recommended for them. Hoping to run the MP40s at 50% or less and get more out of them.