Its been awhile since an update, but I should have some pictures up by tonight!
This last weekend was MCMAC, the Mid Columbia Marine Aquarium Conference put on by the local Tri Cities Reef club and sponsored by my two favorite stores in Spokane. The whole event was basically a mini MACNA with a frag swap, coral silent auction, raffle and door prizes, local tank tour, and some absolutely excellent guest speakers, Jake Adams, James Fatheree, and Bob Fenner! Heres some key points I learned from their speeches:
Jake Adams (Fluid Dynamics):
Gyre flow is way better then random flow. This is because of the way corals are shaped, when a large body of water hits them it will break creating localized pockets of totally chaotic flow, much more random then we can ever get by using wavemakers/sea swirls/whatever. Secondly, a gyre takes much longer to start up in a system, but once its going the inertia of the water will keep moving it and the viscosity of water will drag along even more water molecules effectively moving the water body of the entire tank. The example he showed us was of a ten foot long tank, with eight vortechs all on one end pane. Only four of the vortechs would fire at a time, but they would go for 10-15 minutes and they had the water whipping around the tank!
James Fatheree (T5 and LED Light Testing):
Painting the back wall of your tank reduces your PAR, and lights produce more PAR when shone into a tank full of water. Counter-intuitive, but this guy has the tests to back it up. Both phenomena are due to the fact that that light bounces off the inside walls of the glass when water is in the tank (Total internal reflectivity, why some walls look like mirrors depending on the angle). Thing is, light can bounce of the inside edge of glass and the outside edge of glass, but when the back is painted or some material is applied to the back in an airtight fashion light can no longer reflect off the outside edge, halving the reflected light you would normally have. This actually causes a noticeable skewing of par near the back pane, dropping it close to 100 PAR compared to the front. The good news is that having some material that does not fit airtight covering the back still allows the full amount of reflection.
Bob Fenner (Pros and Cons of Hitchhikers):
Bob Fenner is crazy. Crazy in the funny way. He said no crabs are truly herbivorous and they are like him with vegetarian pizza, they might not like it but they'll eat it in a pinch. Also, a quote about a local members Powder Brown Tang: "Most Acanthurus japonicus are thin and skinny, but this has to be the healthiest specimen I've ever seen. It is thick and robust, just like me"