EuroReef Club

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Hey guys i got the new flex tank adapters in today and finished installation of the two pumps. as per ER i drilled the nipples to roughly 3/16" to allow a 30% increase in air intake and have the new style airline kits coming in this week. i've designed me a 'box' (for lack of a better word) that allows only water from the overflows to accumulate and feed a bulkhead that the skimmer feed pump draws water from, this should give me 'raw' overflow water into the skimmer with no fluctuations. i'll keep everyone posted as the parts get in and put on. the stand is about 90% built and the finish system should be on the truck at the shop Monday so hopefully i'll be getting this thing wet again soon.

kc

29872CS12-2_RC_Mod.JPG
 
I don't know if it made anny difference as I didn't do a before or after test, but when I bought my cs12-2 rc used, the airlines were kind of short, so I bought some tubing that had an inside diameter that was about the same as the original's outside diameter, cut the old airlines flush with the top of the nipple, then pushed the new airlines over top so it has a bigger tube to pull air through.
Seemed to me that bigger diameter air tubes would allow air to flow through with less resistance. Heck, we talk all day about larger plumbing diameters for better flow.

I did mean to drill out the venturi's but forgot..so 3/16 is the size, eh?
 
ER claimed the new airline kits have larger ID and air control valves, they have modded the new venturi to the above mentioned size and also have a 'kit' at H20Tropicals now but it's 279 bucks each for Sedra 5000.

kc
 
They are charging $279 so you can drill your Expensive ER Skimmer and make it work. Remarkable.
Yes I have one, already modified it. Seems a bit much for a Sedra Pump.
 
i spoke with Jeff at ER about doing a RC mod to it and he said doing half a mod would improve skimming and a full mod would do wonders. well i had the parts for 1/2 the mod and ordered enough to finish it up to a full one but they haven't made it in yet,
Click to expand...

what's the difference between half a mod and a full mod? I've been having really good success with an OR2700 as a pump and the gate valve mod, but the recirculating mod looks like a good thing to try.
 
also for it to be a 100% ER style factory efficient design the intake hole needed to be at 10.825" from the bottom of the body, i may mod to match that if this one doesn't do what i hope it will when i get it back in the system.

kc

EDIT added a few quotes

euroreef said:
Looks good! I would suggest ordering new airline tubing/ airline control valve as the tubing you have is an older style and has a smaller ID. The airline control valve will allow you to control foamate production. In addition, if you carefully ream out the venturi nipples with a 3/16" drill bit, you will see a substantial improvement in the performance as it will increase air intake by 30%!! Ream the part in steps with 3 dif size bits working up to 3/16.

Mag 3 should be ok. 1-1.5x system volume per hour through the skimmer is ideal.

Enjoy!

-ER
Click to expand...

euroreef said:
Well, you have the pumps mounted a little low, but you shold still get better skimming than in the traditional flow through orientation. Be sure to limit feed to skimmer to 1 - 1.5x system volume per hour. :)

-ER
Click to expand...

euroreef said:
At the bottom, as you have it, I would estimate that you would draw between 5-6 lpm air per pump. If you mount it up on the side at the right height ( i can provide specs for you) you should get closer to 8 lpm per pump. if you ream out the venturi nipple to 3/16 ID, you can get closer to 10 lpm per pump. I highly recommend purchasing an airflow meter. Here is a link to one I suggest:

http://www.dwyer-inst.com/htdocs/on...3fc949234-CCD48E76-255C-7595-D27143ABA99FCE4A

-ER
Click to expand...

euroreef said:
The amount of air translates into volume of bubbles, therefore surface area, therefore efficiencly.

The spec: the top hole (pump OUTLET) should be centered at 10.825 inches, the bottom hole wherever it falls based on your plumbing. Be sure to use fairly long piece of pipe between the pump outlet and skimmer so that you can attach a 45 degree ell inside the body to direct the output on a slight angle downwards so as to aid in filling the chamber more completely.

-ER
Click to expand...
 
Anyone doing a RC mod to an 8-2 w/ Sedra 5000, as per ER "Top hole is at 9 7/8 from base"

and, "The 8-3 RC pump outlet should be at 11 3/8" from the base. The suction or "inlet" should be centered below that."

hope this helps someone out.

kc
 
I have a CS8-2 with a Sedra 5000 and I might try that mod if I can find the parts. What Mag Drive would be good to feed it, a 3?

Dave
 
you need to feed between 1x and 1.5x total system volume into the skimmer, if your tank has a total volume of 200g-300g the Mag 3 is a good choice.

kc
 
I am thinking about upgrading my CS 8-2 to a 12-1 recirc model.
It will be on my 120 gal tank with medium bioload. Do you think it will produce much more skimmate per week than my 8-2 no recirc model?

Is this a worthy upgrade? I will be selling my used CS 8-2 and buyng a slightly used 12-1 recirc model. The difference is about $250.00
 
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