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Discussion Starter #1
To all of you who have done the homemade MJ 1200 mod with pvc shroud and model boat propeller:

My powerhead will now only push water if it is able to suck in air with it, otherwise the shaft bounces around and it won't push anything at all. Any idea what could cause this? I am thinking maybe it is stalling out. I used the version with two propellers arranged like a screw. Maybe the weight of the water is preventing it from biting unless it is mixed with air? I don't know, but I hope someone knows a solution to this.
 

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Discussion Starter #2
I figured out my problem. Using the double prop required too much torque of the motor so it couldn't start up. Unfortunately, even with a single prop, the unit is very noisy and doesn't give me that much thrust. Bummer...
 

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I wasted my money on 2 different mj mods they where always a problem so I bought a few koraline pumps made that way, it was well worth the money I think they use less energy and maybe less heat to?
 

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Carpe Noctem
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My beef with the korila is that I was replacing them every 9-12 months. They were under warranty, but it was a pain. I still recommend them for people though as they are great for the money. Who knows, perhaps they fixed the problem since the last one I got has been running for over a year with no problems, but I use it to mix salt in a 44 gallon brute now;)

Currently I'm running a MJ1200 modded with the sureflo kit and after the first couple days of rattling, it has done great. No issues at all... And I modified a korila magnet to hold it in place:funny:
 

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With the quality and relatively low price of the available Maxi mods out there is little reason to go through the trouble of the DIY mods. The nice look and fit of the molded shroud alone is enough reason to buy one of the kits.
 

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Discussion Starter #7
Jadinop I realized today that you are 100% right. My mod is noisy, soo so noisy. And ugly. I can get an Ecomod at the LFS for like $15 bucks. Cku or anyone else, what other feedback do you have about that one?
 

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I have run both the Eco and Sure Flo mods. I prefer the quality of the Sure Flo kits but they are almost double the price. Eco mods will do the job as well.
 

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Carpe Noctem
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I've read a few posts about the stopper being of a better design over the sureflo and that they work better on a mavemaker. But I couldn't get them locally and grabbed a sureflo, but I don't plan on running it on any type of a wavemaker. Ultimately it is just in there until I can get another vortec... but lights are next on the buy list;)
 

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Discussion Starter #10
Alright, well I can get the Ecomod for $15 right down the street. I'll give it a shot. I won't be using a wavemaker or anything, so that wasn't a consideration for me. I just need something that produces better flow than the original and doesn't sound like a jackhammer in my tank :)
 

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because the anti reverse of the eco mod is built into the rubber bushing there is almost no noise. I have been running mine for 20min on/5 min off for a month without a single click out of it.
 

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Discussion Starter #12
Well, I picked up an ecomod. Wow I wish I bought it from the start. Only cost a few dollars more than building my loud, ugly piece of junk home build, and pushes WAY more water. Just an awesome piece of gear.
 

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Alot of people complain about how loose the shroud fits. I just put a small piece of electrical tape on one if the tank and that made it very snug.
 
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