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Johrn, not exactly sure of what you are asking, but you do have to put the pump cover back on, enclosing the needlwheel as it was before. The end of the black air line tubing is just as is (without the silencer). You can see it in post #27-3rd pic.

I'll try to post a pic of my return later evening. I did not use a ball valve for mine, just some PVC with a Y to vent it. From what I've read you only want to use a ball valve for the return on recirc skimmers. The purpose of the return mod is to vent the pressure so the water level in the...

Grubsnaek, yes it replaces the original air intake/venturi. The larger diameter of the tubing allows the pump to pull in more air. It basically doesn't choke/govern air flow like the original venturi does. If you don't put enkamat on the needlewheel and only do the venturi mod, it probably...

Here is another one I made using the stock intake that comes with the OTP 3000 pump. The only difference in this one is it uses a different attachment for the air line(not the 1/4' male to male plastic fitting found at Lowes) As you can see in the second pic the 1/4' male to male water fitting...

I've done a few different one's. The first was done with a new piece of PVC. Not sure of the exact size, but take your cover into lowes and look for the correct size that will fit on the threads, it must be a reducer. As you can see in this pic it is the gray piece. Once you s c r e w this...

Also, I used three layers of enkamat. It's hard to tell in the picture, because the fishing line tied the enkamat down very tight so it won't rub against the volute.

Grubsnaek, I currently have a 55g DT+10g sump+20g fuge. I recently got a 75g RR that I will soon switch out with 55g DT. No doubt it's overkill for my system, but I wouldn't have it any other way. I personally think all manufacturers overrate their skimmers big time. I'd say a modded NW-200...

Here are a few pics of my moddified Octopus NW-200 needle wheel. The third pic you can really see the fishing line used to tie the enkamat to the needlewheel. I used zip ties at first to tie the enkamat to the needlewheel, but I had a lot of rubbing between the zip ties and the back of the...

DO NOT DO THIS MOD WITHOUT A KILL-A-WATT METER! It is very easy to burn out a pump if this mod is not done properly. Copied from a previous post of mine, and this is for a Octopus NW-200, the older version: Basically you take the impeller out and pry off the first needle wheel and leave the...

As long as you don't have a problem with doing large water changes frequently and you have a FO, softie, or LPS tank, you can get by without a skimmer. But for an SPS tank, a skimmer is a must IMO. I've never seen a nice SPS tank without a skimmer. Skimmers do more than just take out DOC's...

Montipora Digitata's and Montipora Capricornis(a close second) are by far and away are the easiest SPS to keep. A little more than a year ago I was out of town on business when the power went out. It was out for two days and when I returned my tank temp was at 66. Needless to say I lost my...

Originally Posted by GreenReefer don't mean to steal the thread, but do one of have a good link for the mods to be done to a octopus NW002? Google: Octo NW200 Step by Step to 40scfh Basically you take the impeller out and pry off the first needle wheel and leave the second on. Use a knife and...

My Octopus NW-200 sits in a 10g. I lucked out and only paid $179 for it when it was on sale. It's a bad arse skimmer for the price when you mod it. You won't find a better skimmer for the money.

Google: Sneggs

Glad to see it worked out. Originally Posted by FatTony Cool build... I made a second column for my reactor out of a 2 liter coke bottle :) Any pics by chance, I've been thinking about adding a second chamber to raise my effluent pH. I've heard of people using phosban reactors for this, but...

Originally Posted by fishfreak1242 Right now I have the drain pipe hooked up with a 90 degree elbow on the end and it is just a little shorter than the end of the u-tube. That is most definitely your problem, put in a taller(longer) drain pipe in the outside box before the bulkhead and you...

You can use two sumps, but you must have both return pumps in the same chamber. You will not match flows with two return pumps in two different sumps. I would tie both tanks together with a simple drain to gravity feed water into the other where the return pumps are located. You won't have...

It sounds to me like you need to put in longer drain pipes in the box that sits outside your tank. This will raise the water level in both boxes so no air can get in and break siphon. If you post a picture of both boxes when you turn your return pump off, that would help to see if this is the...

If you paid less than $700 for that whole setup including lights, you pretty much robbed the guy. Congrats!

That's nothing IMO. In my 55g with a 10g sump and a 20g fuge-I evaporate about 1.5 gallons per day, in the winter closer to two gallons per day. I have 2 fans though, which are used for evaporative cooling. That's why I have a DIY gravity fed ATO.