Day 25: Let there be LIGHT!
Saturday, February 25, 2006
Today, I installed my hanging light hood. It’s a DIY, not the best looking thing in the world, but it’ll do for now. Now that I’m so far away from my parent’s place in Ottawa, it’s difficult to do my projects without my dad’s workshop. (I’m 4000 Kms away now.)
The light is a basic aluminum batwing reflector, mogul base connected to a PFO 400w metal halide ballast. I’ve got a few different bulbs: a PlusRite 10K, which I found a bit too yellow, even with 65w PC Actinic that’s also mounted in the hood; an ARC (LFS’s own brand) 20K, which is obviously quite blue, but I got Zero growth from it; the last one is a Venture/PFO 10K lamp, but looks more like 13K. The Venture lamp was over $150 CND, and I was quite pleased with the color and growth.
Even though the tank is an open top and the lamp is over 12” from the water, the halide puts out quite a bit of heat. I added a 12” fan behind the tank, blowing through the hood. It keeps the tank about a degree cooler than when the fan/lights are off. It’s quite dry here is Edmonton, so I get about 1/4 to 1/2 gal of water evaporation per day. I tried to find a smaller clip-on fan at a couple of stores yesterday, but the fan selection in winter is quite limited. I can also put a couple of 4” computer fans on the hood, but I’m not sure if that will be enough...
I also made a trip to the LFS and purchased about 4lbs of Fiji/Tonga LR. One of the smaller pieces has quite a bit of macro-algae.
I noticed I have some flatworms here and there, quite small, about 1.5mm across. There’s still hundreds of tiny snails on the sand bed.
I also bought some Phosban at the LFS. I added about two tbsp and some fresh carbon to my HOB filter. Hopefully that’ll minimize the time it takes for the cyanno to die off. I was going to add a small clean-up crew, but I think I’ll wait another week or two.