Looking for info on ETSS ReefDevil 750 Gemini

[l_m]

Does anyone have the original documentation for the ETSS ReefDevil 750 Gemini (dual-tower 25" tall, collection cup with black square, 5 yr old model)?

I bought one used without the bioballs and pump. What is the correct pump to use (Iwaki/MagDrive)? I imagine 750 is the processing flow of the skimmer so Iwaki 30RLT or MD9.5 should do it, right?

How many mini bioballs should I put in each tower? Looks like if I fill it to 1/3|1/2 the height, I would put ~20 balls in each.

I contacted AETech but could not get any sure info as the model is too old.

Thanks in advance.
-L

 

[NaH2O]

Welcome to Reef Frontiers!!!

Here's a bump for you....

 

[les]

The pump should be an Iwaki MD30 or even the MD40. I've used the Mag pumps on a smaller model and not had the best of luck with it. Attached is the list of bioballs used for the new skimmers. These come with the large ones and fill the necks most of the way. If you have the smaller bioballs then play with the total count until you get it adjusted right. If you want to PM me with your direct email address I could email you the entire manual I have.

 

[mike]

You should try the Iwaki 40RLT. You can always dial it back, and depends on the water level in the sump in relation to the skimmer. Just my opinion, Mike

 

[Beto]

Holy smokes. Here I thought I was the only one who still had this model. I contacted the folks at AETech early this year and they responded ([email protected]). The skimmer I got was obtained from SaltwaterCity in Bellevue and they gave it to me with a dolphin pump (similar to the velocity model). That pump gave out about a year ago, apparently Dolphin knew of a manufacturer problem, so Dolpin eventually sent me a DP-800 pump as a replacement. That solution didn't seem to work for me (no skimming happenning) so that's when I contacted AETech. The official response I received from them was to put 8 bio balls in each tower and the recommended pump was iwaki 30lt or magdrive. Long story short, I somehoe ended up with a velocity. I still have crappy result (hardly any skimming at all) and I was at the point where I was looking to replace the whole thing. I came on here to see what other recommendations people may have. But....if you can get yours to work...do let me know.

I have a PDF with the manuals and the original email I received from them. If you would like a copy, let me know where to email them to. Also, I have some bio-balls I received directly from those folks so if you would like some of those as well, I am located in Kirkland. Do let me know how it works for you so that maybe we can learn off each other.

 

[Beto]

les, in reading your attached PDF, if I am getting a lot of mud build up in my skimmer neck, does that mean I should remove some of my bio balls? I only have the recommended 8 per chamber.

 

[l_m]

How much flow are you getting with your Velocity? I have to dial back my MagDrive 9 to get dry foam.

 

[Beto]

I'll need to check...it is a pressure pump rated at 800 gph.

I'll email the specs tonight when I get home.

 

[les]

I would say that your pump may be to big. If you have a gate valve on it you could reduce that flow rate through the skimmer. FYI The ETSS skimmer numbers refer to the amount of water they need to work properly. The Gemini 800 needs 800GPH and so on. I have included the scanned pages on how to operate and adjust the skimmer.

 

[l_m]

I would say that your pump may be to big

yet he's not getting enough foam in the riser!

Beto, are your injectors and air intakes clean? Can you feel the air coming out of the collection cup? Mine could blow a candle 2 feet away!

 

[hopper]

Superskimmer.com for info. AETech's home page.

 

[Beto]

I checked the injectors and checked the air intakes and they are still clean. I have air coming out of collection cup. I am adjusting to pump flow rate, playing with the bio ball count per tower, and I still can't get anything. I'm pretty much ready to give in and get a new skimmer.

ETSS, I believe, recalls that the base of the sump remain higher than the water level. Mine is pretty much at the same level. Could this be it?

 

[les]

Actually the water level in the sump needs to be below the outlet of the skimmer. I would check that the piping from the pump be of the correct size also.