I had a problem with 4 MJ1200s leaking electricity in my tank. I pulled each one out 1 at a time and put them in another bucket of water. Each one read between 3.5volts and 11 volts. I called Marineland and asked them of the problem and asked if they had a recall like the stealth heaters. They told me they did not but if I were to send them back to thier comp. they would fix or replace the power heads. I told them I could not send all 4 at the same time because I still had to have water movement in my tank. I removed 2 of the higher voltage power heads while the sent me 4 new ones in the mail. When I get the new ones I'll send the bad ones to them. That is what you call GREAT customer service.:bigsmile:
If you have the same problem, and your MJs are about a year old or less, PM me and I'll give you the # to call.
If you have the same problem, and your MJs are about a year old or less, PM me and I'll give you the # to call.