I just got a 40 gallon breeder and thought I would share my experiences.
I moved over an established 250gph filter and added a Aquaclear 70 to help get my cycle started.
The tank stats are:
40 Gallon Breeder @ 36x18x16
200watt Visi-Therm Stealth Heater (Highly recommended!)
Aquaclear 70 @ 300gph
Generic HOB @ 250gph
Custom Cut Plexiglass Cover
25watt All Glass Aquariums Strip Light
30lbs Natural Gravel
3 Pieces of Resin Driftwood
Inhabitants:
2" Goldfish
1.5" Zebra Danio x5
1.5" Rummynose Tetra
2" Senegal Bichir
3" Dojo Loach
I wanted a nice school of fish, so I went with the zebra danios since they are such hardy fish. I saw the single rummynose tetra swimming around in the tank and since he had been adjusted to higher pH water and had been in there for awhile, I decided I would pick him up to. While at PetSmart the other night, I noticed the Senegal Bichir and one of my favorite fish, the Dojo Loach. Of course I had to pick them up for my 40 gallon. I'll be adding some live plants very soon. I have more anachris and amazon swords than I know what to do with. While the resin driftwood in the tank has fake plants that look very nice, I still want the benefits of having live plants. I'm curious as to whether or not an amazon sword would survive with a 25watt light.. I know I'm not even pushing 1 watt per gallon, but lumens are just as important as wattage. I know my amazon swords and anachris are growing extremely well in my 29, and it's got the basic lighting that came with the tank. It does have 20 lbs of eco-complete planted substrate though...
Here are some pictures of my new tank. I'll keep adding pictures as the tank progresses. (You'll have to forgive the poor picture quality. These we're taken using the camera on my phone. As soon as I can get my digital camera, I'll post some better pictures. Til' then, enjoy these pictures and let me know what you think!)
Here's a picture of the tank before the gravel and driftwood we're added. It still has the 'rigged' glass cover on it.

Here's a picture of the tank with gravel and driftwood, however it is still set up in the floor.

Here's a closeup of the driftwood in the tank.

Here's a picture of the stand my brother-in-law built me. It only cost $13 dollars to build and is extremely sturdy. The picture shows the stand before the 3/4" piece of plywood was added to the top.

Here's a picture of the tank after we put it on the finished stand.

Here's a picture of the senegal bichir that was recently added.

I'll post some more pictures soon! Til' then, be sure to post your comments!