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Sorry to see that Kevin. I recently switched to a Waveline DC6000 that I picked up used from Tommyboy. I still have MAG 9.5's ready to jump in there if and when the Waveline dies. I was actually thinking about picking up a Jebao DC6000 as a backup to the Waveline. Now I'll re-think...
I have a couple questions.....FYI, the advertised level of Mag in Red Sea Coral Pro salt at 35 PPT is 1350 to 1430 mg/l.
1. What are you using to measure salinity....refractometer, swing arm hydrometer, floating hydrometer, etc?
2. What test kit are you using to measure magnesium?
Well, if you consider new, The Hidden Reef (in Levittown, PA) also sells new tanks at cost....they figure they have you hooked for the rest of the gear.
The 220 seems like a pretty good deal....and yes, a simple plug can be used to block off the closed loop bulkheads. You'll just need to provide flow by powerheads/gyre.
This guy is killing me. I wake up this morning to find that he has now excavated the sand from around the the cave opening, actually exposing the pipe. He moved a bunch of the sand into a pile that is being picked up by the MP40.
I would have guessed it was set up as closed loop at some point. I'd try to avoid check valves....there are ways around them. They will eventually fail.
He came out!
Sorry for the poor quality...under moonlights, slow shutter speed and hand held. He took about 8 to 10 mouth fulls of sand and then darted back into his home. I'm happy! :D
Phil, I think (and that's a BIG think) it has a standard behemoth overflow (I think I see it). I've got to believe those "extra" bulkheads we see are for a closed loop....but that's a guess as well. If it was me....a cheap SOB....I'd offer 1000 and see what happens. I actually think that...