MJ900 not Enough Flow!! Not impressed!!

[focus]

Okay bought 2 MJ900 and bought the CNC prop kits from a guy over RC. Am I missing something? The flow specs stated seem way over board.1k plus gph no way! No way is this enough flow. Any thoughts? Does the real propellar mod sold here by our vendors really produce? I swear my old 802's had more flow than this. And they only flowed in the 400 range.

 

[NateHanson]

Are you sure it's not spinning backwards? Try restarting it.

 

[focus]

Positive.
These have a machined in stop to correct for this problem. You can see it as well just not very strong IMO.

 

[dpnshnks]

The mod by PHReef is on a maxijet 1200, so right there it will have a little more power. I bought two mod kits and could only use 1 in my 90g tank...2 was just way too much flow!

Eric

 

[naturebatslast]

I've also read that some of the twin prop setups are not as good as some of the other single prop versions. There was thread not too long ago someone looking for other types of props, as well as the discussion of the MJ mod and its updates. Also, I wouldn't expect a $25 MJ to be as good as a $70 Seio. The idea of the MJ mod is to bump up and widen the flow of an MJ (1200) for 20 bucks in parts . I don't think you can compare the two.
NBL

 

[smcnally]

Also, I wouldn't expect a $25 MJ to be as good as a $70 Seio. The idea of the MJ mod is to bump up and widen the flow of an MJ (1200) for 20 bucks in parts . I don't think you can compare the two.
NBL

Actually, a MJ1200 modded blows a Seio away IMO.

 

[nitrofish]

the mod I bought from ph reef is so powerfull that a single mj1200 is too powerfull for a 125 gallon tank. I had to make a sleeve to slide over the intake slots to cut down the flow. I don't know what kind of mod you have, but your welcome to check out the mod in action if your in the worcester area.

 

[naturebatslast]

I agree and had the same experience with MJ's modif. What I meant was if you want a Seio buy it, it'll be a great a pump. But if you have MJ 900 or 1200 and want to bump it up (way up) then modif it for no or little money. For myself, the MJ's modif was just pure economics.

 

[focus]

The mod by PHReef is on a maxijet 1200, so right there it will have a little more power. I bought two mod kits and could only use 1 in my 90g tank...2 was just way too much flow!

Eric

This isn't the PHReef set-up. It's from a guy from RC who is selling the kits. Screw type prop. CNC machined. He was banned for selling on the RC forum.

I did contact PHReef today to try a couple of his mods. The only thing I like about this 1 is you can use a wave maker. IMO this isn't enough flow for Soft Corals never mind SPS. I hope the PHReef mod is worth it.

Rob

 

[nitrofish]

This isn't the PHReef set-up. It's from a guy from RC who is selling the kits. Screw type prop. CNC machined. He was banned for selling on the RC forum.

I did contact PHReef today to try a couple of his mods. The only thing I like about this 1 is you can use a wave maker. IMO this isn't enough flow for Soft Corals never mind SPS. I hope the PHReef mod is worth it.

Rob

I think it is worth it, im getting the same flow I was getting out of my tunze's but for $700 less. I have never tryed it on a wavemaker, so I can't comment on that.

 

[RichConley]

Are you sure you've got it set up right? Are you sure yours wasnt built for a 1200?

My 1200 dual prop mod moves more water than both my SEIO 820s put together, so something is wrong here. (Mine is one I got off RC, not PHReef)

 

[RichConley]

The mod by PHReef is on a maxijet 1200, so right there it will have a little more power.

As far as I know, the MJ900 and 1200 spin at the same speed, so as long as they can both handle the prop, the 900 will put out as much flow as the 1200.


What the 1200 gives you is the option to use a much bigger prop.

 

[NateHanson]

But won't the speed depend on the size/pitch of the prop as well as the size of the motor? Perhaps their free-wheeling speed is the same (out of water for instance), but if the motors are different capacity/wattage, then with the same load the smaller pump will spin slower.

 

[clamm]

Funny, its probably the same guy that said he would do them for 20.00

Patricks (ocean flo) are very very strong, He had to do a special prop for me to limit the flow in the 92 corner.

 

[RichConley]

But won't the speed depend on the size/pitch of the prop as well as the size of the motor? Perhaps their free-wheeling speed is the same (out of water for instance), but if the motors are different capacity/wattage, then with the same load the smaller pump will spin slower.

Yeah, flow is prop pitch/size dependant.

The normal 1.25" props dont bog either motor down enough to make them flow any different(or significantly different)


As to the OP, have you talked to the guy? He'll probably fix it for you.

 

[focus]

Are you sure you've got it set up right? Are you sure yours wasnt built for a 1200?

My 1200 dual prop mod moves more water than both my SEIO 820s put together, so something is wrong here. (Mine is one I got off RC, not PHReef)

I don't know if they are for a 1200??
They fit fine and they start every time. These are not individual props but 1 machined part which snaps on the magnet. It's not rocket science, so yeah they are assembled correctly. They only fit 1 way.

Sent an email to our vendor here but they haven't responded yet. I'll try a couple of there prop mods on the 900's next.

 

[ScottM]

I don't know if they are for a 1200??
They fit fine and they start every time. These are not individual props but 1 machined part which snaps on the magnet. It's not rocket science, so yeah they are assembled correctly. They only fit 1 way.

Sent an email to our vendor here but they haven't responded yet. I'll try a couple of there prop mods on the 900's next.

the lutz model "Patent pending"...??

The model we carry (phreef's) is designed for a 1200 MJ. You could run it on a Maxijet 900, but that’s at your discretion. The 900 will run them but has not restarted 100% of the time in testing. (testing was truning on and off over a period of time to ensure restart)

We have sent out quite a few of these and have had nothing but great feedback. Patrick has been testing and running these for over a year now.

If your interested in the Kit, you can find them here: http://www.reefdom.com/Phreef.asp

 

[RichConley]

Could we not turn this into a "Sell reefdom's product" thread?

Lets try to figure out why his unit isnt working, before we get him to spend unneeded extra $$.

Now, I havent used lutz's piece, but i havent heard anything negative about it either. I've also heard that he replaces parts when he comes up with a new design.

Does the prop look like its spinning fast enough? Even a small prop should put out 1000gph +

 

[focus]

Well no way I can tell for sure as far as speed. Nothing to compare it to. And yes it's the Lutz MJ Mod. Didn't want to turn this into yours is bigger than mine type of thread. Anyone else with this mod on the forum??

Let me put it this way, 10" from the glass, 8 inches down it barely moves the SD sand. Now the way most people talk if this was working correctly it would be a sandstorm. This is on a 75 so the tank isn't that large either. With 2 it should be to much flow?? I don't know people, this just isn't what I expected.

 

[smcnally]

Could we not turn this into a "Sell reefdom's product" thread?

Wow Rich, you seem to have a problem whenever someone brings up the maxi mod from PHReef and Reefdom. If it was them bringing it up I'd understand, but they didn't. They just responded after the fact. How would you suggest he fix it? He said it was a one piece unit. If it works but doesn't put out much flow then it sounds to me like either a bad design, or it was intended for a 1200. I'm not trying to flame you, but nobody told him to go with the "oceanflo" mod. When he mentioned his mod we thought that was what he was talking about and then he PM'd Reefdom about it. Relax, man...