Yes Keri, I have done them all myself. But perhaps not the way the pro,s install them, making mods to suit my own needs. The hardest part is running the ducts if the basement is all finished. If not then its not to bad.
http://nutech-energy.com/life.htm

I ran my return fresh air different than specs say, depending on the amount the places were finished. My home in Thompson had a nice crawl space, so it was fairly easy.

I use a Venmar 3100 Air Exchanger/Dehumidifier.
This unit does it all. It sucks in dirty, stinky, humid air from the tank room, takes in fresh air from outside, runs it all through a HEPA filter and heat exchanger, then blows the fresh, dehumidified air into the furnace ducts and expels the bad air outside and drains the water down the drain. Runs about 15 watts on the power cycle I use. Highly recommended!!

I do have to top off more though because it drys out the air in the room.

I simply had an ultra-quiet Panasonic bathroom fan installed installed over tank as part of the basement reno. It's hooked up to a plain old programmable timer. Works just fine.

i open the window.

I have about 140 gallons total between smaller tanks in my 1 bedroom apartment.

I just leave a window open 1/2 way, keeps the humidity at bay.

I am in BC so its not really cold except for a few periods each winter.

Oops hit the wrong button. With our mild winters on the coast, all you need is an exhaust fan in your tank room and your problem is solved. Mine is an inline fan that exhausts the air from directly the aquarium hood. Installed a 3 speed switch inline, low for winter and high for summer.

I have 300g (3 tanks) in my family room and did have an HRV installed, plus the window is ALWAYS open in that room, and we do leave the fan in the range on low....to keep the air flow going....so far we have no mold issues and have had both tanks in there for a couple of years now...I go through about 10g every other day (UGH I know) as both tanks have halides and tend to get too warm. We have AC in the summer that is full blast in this room, so the fans aren't cooling by evap as much.

I really want an HRV but Drew thinks it will be too hard to install with no existing ductwork as we don't have a furnace, just electric heat. (He's probably right, he's pretty reasonable lol) :( But....an exhaust fan.... you just punk a hole in the wall and set it up, right? I like the idea of a humidex but I don't know if it will be powerful enough.... Oh choices...

I bought one of te fantech fr100 fans. http://www.hvacquick.com/frfnconfig.php?fm=frGot it off ebay think I paid around 110 bucks and it stays on continuously for a year now with no problems, only 19watts too which is good

thanks - I've bookmarked that page for Drew to look at:mrgreen: