First off I'd like to say I've been reading your articles on algae scrubbers and I really like the information I'm hearing. I've been out of the hobby for about 15 years now after closing down a build & maintenance aquarium services I used to have. I'm going to be starting an 18g nano reef, the last reef that I had was an 8g in a 10g tank with just a skinner & mechanical filtration 25 years ago. The dimensions of the new tank are, 16"W x 16"L x 18"T. I was planning on using an old powerhead that's rated at 265 gph. The Scrubber I plan to build will be 7.5" W & 3" Tall, using LEDs that's going to be mounted above the tank inside the canopy, in this way the pods can drop right into the tank. So is this to small? I'm basing the size off of your articles, 35 gph per in. then going with the tallest size I can get in the canopy I'm going to build. Aesthetics is what's keeping the canopy to a low height. Regarding the leds what kelvin rating would you suggest 3500 or 6500K? Tanks so much for your contribution to this hobby.