Yea Chad I think you would be fine. As sean said I don't believe there would be much pressure in the filter anyway. Depending on the type of cannister the only pressurized area(after pump impeller) would be just a small area and the return hose to the tank.

As you mentioned they are availiable for heaters. It's amazing what a compression type fitting and or an oring will hold as far as pressure is concerned. I remember seeing a probe holder once that goes onto your return plumbing on your tank. Another item that's along the same idea.

I'm excited to see this mystery project! :cool:

Chad
Are you trying to heat the water inside before it leaves the canister?How big is the heater going to be and how are you going to monitor it?
I like the idea,be interesting to see how it all works.

Hi,
Thanks for your interest. I was planning on surprising everyone when it was all built but maybe I should spill the beans now incase there are problems with my design.

My plan is to turn an eheim 2222 cannister filter into a "sump" for a 3gal nano :eek: .

I know that some cannister filters come with heating elements inside but these are designed to heat large tanks and are usually 250W and bigger!
If I needed a heater at all it would be the smallest that I could possibly find 50W??

I actually don't believe I will need a heater because my plan is (and this stays between us :razz: ) to put a submersable light bulb in the bottom compartment of the cannister along with a handful of chaeto. The top layer of the filter would be for live rock rubble and both of the lines would be plumbed into the bottom of the tank through 1/2" hosebarb "bulkheads" with the inlet and outlet hidden by rockwork.
This will allow me to add more water volume, additional biological filtration, and provide all of the circulation needed without having any visible equipment or plumbing or electrical cords!!
My plan was to put it on top of the island in our kitchen and have the cannister below with the pots and pans. I think it would be awesome because it would allow for 360 degree viewing, but my wife isn't too excited about me drilling the countertop. It would be lit by a desklamp with a 50/50 pc bulb and contain a rock "pinnacle" in the center of the tank with clippings of soft corals from my "big" tank. I would have a hermit, maybe a neat looking snail, and an arrow crab.
Man, I'm gonna build the thing now, even if I don't have a place to put it yet!

I would need to decide on what would be the most stable heating technique and also how to match the return flow to the size of the tank. Possibly through splitting the return or modifying the impeller.
What do you think?

- Chad

I call it my Sump-in-a-Can.
Man I suck at keeping secrets...

you can put a valve on the return side of things and trim the impeller a little bit I dont think it would be a good idea to trim off to much. the light might give enough heat but a heater wouldnt be a bad idea just incase. you can try http://www.nano-reef.com they can help you out there. I had a 3 galon this summer I had a small goby, small perk, 3 hermits and a turbo snail. you can also do a sexy shrimp.
hpe this helps

Brad

Thanks, Brad. I have just posted on nano-reef as well. I'm hoping that i can put a t-fitting on the inside of the tank (under the rocks) and this will allow for the full flow from the eheim without having too much velocity.
Here is a picture I found in Coral magazine of how clean I want the tank to look:

http://www.canreef.com/photopost/dat...5dreamtank.jpg

A sexy shrimp would be awsome! I can't seem to find the things here in Calgary. The closest I came was at Big Al's where a staff member told me that they had three of them in the tank. As she was trying to spot them I said "you mean this tank? The one that says 'mantis' on it as well?"

"ya"

"miss, you aren't going to find any sexy shrimp in there anymore..." :rolleyes:

Why not just use one of the inline heater modules (sold just about everywhere) for just that purpose? Or for that matter you could build one, looks basically like a T fitting, some PVC pipe, then a threaded cap with a hole / o rings in the top for the heater.

BTW if you find sexy shrimp lemme know :) My 2.5g (soon to be 3) is begging for one.

Andy

Andy,
Good thinking. I'm not sure if I will even need a heater yet - it will take some testing. I'm expecting the heat from the bulb and the pump to add a few degrees over room temp - especially in this small a water volume. And my house is already strictly temperature controlled for a very sensitive organism - me :lol: .

And yes, you'll be the first to know if I find any sexy shrimp.

- Chad

As the owner of a 2.5 - I can tell you it sure can't hurt to have one. I know the heater on my nano comes on semi regularly at night. I'm assuming your tank wont be lit 24/7 :)

I always prefer a heater that I don't need over one I don't have.

BTW 20g's coming along nicely - she's up and running as we speak; hopefully the 175w MH for it arrives early in january.

Andy

Andy,
Actually the bulb in the chaeto fuge will be on 24/7 but I can slip in a heater if I need. I really have no idea how much heat a submerged light produces - who knows, I might need a little chiller instead :razz: .

Glad to hear that the 20 is working out for you - can't wait to see some pictures!

- Cahd