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ntswift
10-22-2010, 01:12 AM
Just a quick few questions. I just got my BM 250 in today and was putting it together and was a little concerned on how it was set up. The collection cup just sits on the base with out any kind of seal or anything? Is this normal or am i missing something? Also, there are holes along the lid of the collection cup that look like screws would go there but on the collection cup itself there arent any places to screw into. What is up with that? Sorry, just never had a skimmer like this before. They've all been ETSS's. Thanks!

Matt

thatguy559
10-22-2010, 01:18 PM
i got the 200 model and thats normal for no seal doesnt need to be one if its in sump. the holes in the lid are for oveflow if the cup fills up completly.

this is the one righthttp://www.aquariumspecialty.com/catalog/images/BM250_Sm.jpg

BTW this skimmer rocks.

ntswift
10-22-2010, 01:34 PM
Yeah thats it. Its already pulled 1 1/2 collection cups out since last night. Although last night i was still getting the water level right but since that its already filled half way up. Its doing way better than my old skimmer! The holes make sense but having no seal kinda throws me off because i can see it leaking from where a seal should be. But if thats they way its supposed to be then so be it! :) Thanks for the info!

Matt

http://farm2.static.flickr.com/1248/5105633834_919128dd6d_z.jpg

thatguy559
10-22-2010, 01:51 PM
you need to raise your skimmer like 2" and fill up the air silencer with cotton balls makes for a shaving cream style foam. thats house i run mine.

ntswift
10-22-2010, 02:32 PM
I'll give it a shot!

ac7av
10-22-2010, 02:46 PM
Some skimmers have seals on the cup mount and some do not. It just depends on the build. The Eshopps in sump skimmer I had did not have a seal and would leak down the body of the skimmer. The swc in sump skimmer I have does have a seal and does not leak. The holes in the cup lid are for the air to exhaust and if it starts to over suds it will some times spurt out the holes in the top but I think any skimmer could do that.

ntswift
10-22-2010, 06:04 PM
Yeah, it makes sense. It was just weird to see because neither of my ETSS's had holes in the top. Just screws to hold the top down with a drain off the side of the collection cup.

mfinn
10-22-2010, 06:37 PM
I think they all leak. I know mine does.


What impeller came with it?

mesh or pin wheel. What color?

ntswift
10-22-2010, 06:47 PM
I'm pretty sure mesh. It was saying something about measuring the mesh every month or so to make sure its within a certain amount. I assume they wouldnt send me those directions unless it came with mesh, then again you know what they say about assumptions...

mfinn
10-22-2010, 06:55 PM
I used the mesh mods for the first 2-3 years I have had mine. But as you will find out there can be startup issues with the sicce pumps and mesh.
You get the most air draw using the mesh.
Most of the time I just let the skimmer run, even during water changes, but every once in a while I did have to shut off the pumps.
I got tired of those issues and have tried different pin wheels.
The best IMO is the new pin wheel/reducer combo I got from Luke at reeffiltration.com

ntswift
10-22-2010, 08:04 PM
Is that the white lightning combo? Have you tried this mesh wheel? http://premiumaquatics.com/aquatic-supplies/ATI-0411.html

Skimmy
10-22-2010, 08:14 PM
the new ATI gridwheel will kick any mesh or pinwheel's ass...lol that's the one to get if ur going to buy a new impeller...;)

mfinn
10-22-2010, 08:14 PM
Is that the white lightning combo? Have you tried this mesh wheel? http://premiumaquatics.com/aquatic-supplies/ATI-0411.html



Yeah. Last time I tested, I was getting pretty close to the same numbers as my mesh mods were getting.


Are those mesh wheels for the sicce 2500's?

mfinn
10-22-2010, 08:15 PM
the new ATI gridwheel will kick any mesh or pinwheel's ass...lol that's the one to get...;)



What kind of air numbers are they producing?

Skimmy
10-22-2010, 08:25 PM
well, with the gridwheel, and the new venturi, and new volute, they are getting over 3000lph at only 35 watts out of a sicce psk 2500!!!!
i was pretty blown away to say the least...
http://premiumaquatics.com/aquatic-supplies/ATI-0305.html
now, how much more the gridwheel impeller alone will increase will depend upon what venturi you run, i notice the new style of ATI venturi is only like $20,
but then how much do the two increase the power without using the new ATI volute for the psk 2500 that you CANT buy seperately... so still some grey area, but suffice to say, it'll beat any mesh/pinwheel, and wont have start up issues... but im sure it doesnt do 3000lph without the new unidirectional volute...

Skimmy
10-22-2010, 08:32 PM
oh also, yeah, even though the skimmer cup doesnt have a seal to it, it shouldnt really be leaking per se... it might "weep" a little... but not much if the water/bubble breaking point is right below the "seal"...wich it will be once the skimmer breaks in for a week or 2, you'll see.. you probably are just riding the water level higher because the skimmer isnt broken in yet.

mfinn
10-22-2010, 08:53 PM
I go for wet skimate so my water level is high and I get alot of "weep".

ntswift
10-22-2010, 09:31 PM
Sweet! I'm still sold on it. Just waiting for payday! :) Awesome. I forgot about the break in period for new skimmers. lol...Its been a while since I bought a new one. The skimmer isnt leaking too bad around the seal. Just a little here and there. Obviously when it gets weight on it, the leaking stops. I'm not too worried about it. I was just making sure I wasnt missing any parts and pieces when I was setting it up. Thanks!

iroll253
10-23-2010, 12:24 AM
I go for wet skimate so my water level is high and I get alot of "weep".

I dont under stand this :confused:

What exactly is weep and what do you mean by keeping the water lever high? In the skimmer body? I run mine high and a little wet since its only 20g's

mfinn
10-23-2010, 09:04 AM
I dont under stand this :confused:

What exactly is weep and what do you mean by keeping the water lever high? In the skimmer body? I run mine high and a little wet since its only 20g's

I keep the water level higher in the skimmer body vs. lower. High=wetter skimate, lower=dryer skimate.

We are talking about a specific skimmer, the BM 250.
The cup and body are separate and there is no positive seal, so there can be some small amount of leaking at that joint as has been mentioned.

ntswift
10-24-2010, 06:19 PM
The way I think of it is, correct me if I am wrong, the skimate is more clear with the wetter because there is more water actually getting thru. The drier the darker it is with less water getting thru. If that makes sense? So say instead of skimming the top 10% of the bubbles, you skim the top 15-20% of the bubbles which produces more water in your skimate.

ac7av
10-24-2010, 08:16 PM
The way I understand it is that not all proteins bond with the air. Some more then others. Even the best skimmers do not remove all the proteins because not all proteins are the same thing and can not be removed by skimming. Someone had a great write up on some very in depth testing of some skimmers to see what it is that they actually remove from the water. If I can find the link I will post it. But what I remember is the skimite has the same specific gravity as the water.

ntswift
10-24-2010, 10:33 PM
hopefully you can find it because that sounds very interesting!

ac7av
10-24-2010, 11:38 PM
hopefully you can find it because that sounds very interesting!

I found it.
Try and read threw it if you can understand the very technical information and terms they use then your good. There is a lot of it, that is a lot easer to digest information in between the very technical information. Itís a long read and mostly they are talking about two different skimmer for comparison but the bottom line data on both of them is the same as far as the information your looking for.
http://www.advancedaquarist.com/2010/1/aafeature

ntswift
10-25-2010, 07:55 PM
Thanks a lot!

Aquanaut
01-19-2011, 12:10 AM
well, with the gridwheel, and the new venturi, and new volute, they are getting over 3000lph at only 35 watts out of a sicce psk 2500!!!!
i was pretty blown away to say the least...
ATI-0305 Premium Aquatics - ATI-0305 (http://premiumaquatics.com/aquatic-supplies/ATI-0305.html)
now, how much more the gridwheel impeller alone will increase will depend upon what venturi you run, i notice the new style of ATI venturi is only like $20,
but then how much do the two increase the power without using the new ATI volute for the psk 2500 that you CANT buy seperately... so still some grey area, but suffice to say, it'll beat any mesh/pinwheel, and wont have start up issues... but im sure it doesnt do 3000lph without the new unidirectional volute...

I'm in a dilema where as I will be merging my SPS overloaded 125g into a 250DD and I am not entirely sure what my sump volume will be to determin if I need to continue w/ existing skimmer or mod it further to increase effectiveness, or go to an entirely new skimmer. The thing I dislike most about ATI is the Sicce pump erratic behavior. Need your wisdom skimmerman.

Skimmy
01-19-2011, 11:41 AM
I'm in a dilema where as I will be merging my SPS overloaded 125g into a 250DD and I am not entirely sure what my sump volume will be to determin if I need to continue w/ existing skimmer or mod it further to increase effectiveness, or go to an entirely new skimmer. The thing I dislike most about ATI is the Sicce pump erratic behavior. Need your wisdom skimmerman.

well, if your talking an ATI 200, yes, i'd say thats a bit small for the 250g...
you should sell it, and look at the new ATI powercones