Hey all,

So, as the parts start trickling in........

I want to add an in-line UV on each of my two returns. I also want to place my Mazzei efficiently.

I have a Mazzei 584 and the output now goes to the sump pump. I am adding a NU-Clear canister after the pump (Pan World 250ps) and this will feed the twin returns. So, Mazzei to sump pump to canister to T with a UV on each side of the split and then to the tank.

I was thinking of two 36 watt models

Aquarium Ultra Violet Sterilizers: Coralife Turbo-Twist UV Sterilizers

I understand that I will lose a good portion of my co2 mist due to the long dwell time and that the c02 and water should be well mixed by the time it hits the tank. So good or bad based on how much mist I get........

Questions:

1. Are these UV sizes appropriate for a 180 gal tank? Can I go lower as there will be two of them? Or is it best to oversize a bit?

2. Should I add a separate ball valve PRIOR to each UV to ensure I don't overwhelm them? Relates to the first question.

I know my pump is rated pretty strong and I may not be able to find a high enough rated UV. The ones above indicate at flow rates between 400 and 1200 gph to operate efficiently. I am pretty sure I will get that on each one even driving the NC canister.

3. Should I instead merge the Mazzei output AFTER one of the UVs and not into the sump? The Mazzei is also 3/4 so will slip in easily to the return line. The mazzei also has it's own throttle valve.

Or

I could merge the Mazzei output BEFORE the split to the UVs. This way both units would get c02 enriched water/mist.

Placing it closer to the tank return will generate more mist, but will then only be output from one of the returns

4. Will the UV itself affect the c02 concentration in an adverse way? I can't see how, but figured I ask.

I already have a main ball valve attached directly to the PS output, so I can control the overall output.

Did I miss anything?

Appreciate the help.

Thanks,

Your Mazzei should be Tee'd off right after the pump and Tee'd in anywhere after the canister. What you do not want is pressure loss to the Mazzei which will happen if placed inline after the canister. You also don't want to plumb inline before the CAN because the pump will come across more resistance caused by the CAN and the more it gets dirty the lower the Mazzei performace will be.

The Tee option will give the best performance due to the almost no loss in pressure flow.

I suggest using 1 Current Gamma 40watt UV sterilizer over the Coralfe'si 36watt UV. I had the 40watt but I sold that and got the 25watt intead. I also like the fact that it uses a T5 over a power compact bulb.

THe UV will not affect your Co2, so no worries there

I would have gotten a 384P Mazzei if it were my 180gal but the 584 will work too. Why I say so ....read post 1 through 7

Hi mrkookm,

Thanks for your input. I read the entire thread..........

Okay, so this leads to several other questions:

1. You are suggesting I should eliminate the separate Mazzei pump altogether and thus the feed of the Mazzei to the main sump pump as it is now? Instead just use the PS250 to power it in the bypass loop rather than use the 2 pump system?

Any idea now what to do with the Mag drive 1800 sump pump and the 500 gph Mazzei pump??? lol

2. I see from the pics you link to that you have the Mazzei in the MAIN loop to get more pressure. Do you think I can put mine on the secondary loop, due to the size of my pump, and let the main feed the NC canister?

3. In your picture of your NEW loop, is that an inlet or outlet on the bypass T? I can't make that out... Does that assembly go in the tank, or under the cabinet? Got a pic of the whole setup? Just curious...........

Summary of new config:

So, I make a T right from the pump. Canister goes one way on the T and the Mazzei the other. A ball valve for each component (esp the Mazzei to adjust mist) to throttle as needed. Then combine these two outlets with another T to feed into 1 larger sized UV. Then split again from the single UV to the dual returns and then into the tank.....Is that right?

Is this the UV model you meant?

Current USA Gamma 40 Watt T5 U.V. Sterilizer at Big Al's Online

1. Won't my main flow now be restricted by the UV flow rates? I know this will pass all the cleansed and enriched water to the UV, but a reason for the larger pump was to also eliminate some of the many Koralias I use INSIDE the tank. Will I be 'wasting' or severely under utilizing my pump's ability?

2. Could I instead use two of the smaller models (say the 15 watt) and have one for each return? The cost wouldn't be that much more than one unit...Well compared to the total so far Thanks to you I save $200 on the PS250, so I have $ to burn

3. Did you have to buy a 2" slip/barb kit to install the UV? Does it come with fittings? Or did you get a kit like this link?

3/4 inch Bushing-Hose Barb Kit

or did you find this stuff at the hardware store?

I appreciate all of the help.

Thanks again,

i heard that SERA's t5 UV sterilizer bulbs have been phased out... i couldn't find one here in my part of the world.
any clues where to find one? im using the 16w bulb.

@gerryd
i use my UV in a 250gal pond... 16w only...
so far havent had any problems with green water not until now that my UV bulb has been busted for around 6months and i couldn't find the t5 bulb anywhere in my part of the world...
they said SERA phased out these bulbs ....

by the way, my pond only houses koi and has no plants also..

After much thinking I decided to try an all canister setup to see how much less Co2 I will need to use to get Co2 concentration high in my 90gal. This will be a perfect time to set the cans up since I had to tear down everything anyway and if I don't like them I can always reinstate my sump.

With the new change I had to redo my Mazzei loop to bypass the cans and put the enriched water after the cans. This was done for two reasons: As I was testing my earlier loop config I found if air injection was too high it caused an airlock situation which literally was forcing the water out the can. This I'm sure would not have been the case had I used Co2 at normal output to test but I chose to test at full Mazzei suction to see what would happen if too much Co2 got in. I saw what I needed to seea nd it concerned me enough to scrap that setup. I kept on thinking what if I was away and for whatever reason somethin freaky happened?

The second is pressure. I wanted to be able to pump as much water through my mazzei with the least restriction possible for max performance. While my pump is able to handle a fair amount of restriction with ease, my quick test earlier had me thinking of consistency as the filter gets more clogged.

Here are some pcs as I am setting up along the way:

Water enters the NU-Clear and exits the OC. If I decide to keep the Cans I will go all NU-Clear. They are inded superior to OC IMO.

Mrkookm,

Great pics! You should do this type of plumbing for a living.......

How goes the progress????

I know I would have paid to have someone do this....

So little update for me:

1. Waiting on the NC canister and UV. Should get this week.

2. Installed the new PS250 and the Mazzei loop.

Used nice 1" PVC for the intake, until I get the sump drilled, so no flex on any intake. Waiting on a threaded intake strainer so I can stick a big sponge on the intake inside the sump.

Used flex hose and lots of barbed fittings for the OUTLET and Mazzei loop, but at least I can see how it needs to be routed, and that it works....

I initially forgot the throttle valve in the main loop for the canister, so the Mazzei bypass wasn't getting ANY pressure, as the main pipe got > 99% .

I knew something was wrong......

So realized what was up and installed a throttle valve there and turned it down a bit, and the Mazzei is misting like crazy now that it is getting some pressure!

NC will plumb in easily using the barbed 1" fittings right after this new valve...........

Pearling and flow is much better/more evident, even after just a few minutes.

Best of all, no leaks so far! Knock wood!

So, once the parts come in, I will install them, figure out the permanent placement, and then replumb as I can using PVC piping instead of the flex hose.......

Here are some pics, but I warn you, it is ugly as it is temporary......lol

gerrydirish/New Config - Photobucket - Video and Image Hosting

This was before final trimming and retro-fits. Buckets were for re-dos lol

My sump is just way too big, I may go to a smaller one and add another NC, but will see how this config works out........

The final will look much better...........I promise

I think once this is all installed, it will resolve a lot of issues for me re: c02 and flow especially. The extra canister won't hurt either......

Thanks for all the help.

Gerryd,

Can you see the difference between this pump and the Mag?

Is their a major difference between the 2 regarding overall performance?

How is the mist size now?



Here are some more updated pics showing some minor changes to the loop. The main difference is the addition of spa-flex here & there to reduce vibration. I also took some pics of my gauge showing normal PSI and pressure test PSI.

OC normal PSI


NU normal PSI


OC pressure PSI


NU pressure PSI