Best way to cool a tank for new guinea species

[Jeff9]

Hello all,

I have a 100 x 50 x 70 cm orchidarium, 3x 39w lights up top and a mistking system.

I'm moving my collection more towards species from brazil and cool growers from papua new guinea, such as oxyglossums, barbosella, rupi laelia, lepanthes, miniatures.

What would be the ideal temps for these species? During winter i can keep temps down to 20 daytime and 18 nighttime roughly, but in summer it can get as hot as 30 degrees in the tank.

What would be the most cost-effective way to cool my tank? I was thinking about a small AC unit but that would require a exit hose, and if im correct they will be expensive to run all year around.

I also thought about a small home made evaporative cooler but it wont be enough i believe.

Any ideas to do this properly?

jeff

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