Recently I’ve switched from Kessils , tons of shimmer to xr15 pros, two Kessils to now three 15’s with the aquaticlife T5 fixture which is great for the price, on my 425 xl, they are mounted about 9” off the water and I only have them turned about 40% which with the ab+ settings it works out to be around 30% intensity, since three settings are low, u can easily get two 15’s to cover that tank, as far as those plastic covers go, the lights are already the most expensive, why spend more, 15’s will give u the slightest shimmer, with the T5’s on, no shimmer will be seen, color mixing is great, I’ve watched the
BRS videos about color mixing, u have to look long and hard to find individual colors, it’s just another way of making u spend money, I have a reef link, a definite learning curve there, mostly because my router and reef link is on the second floor and tank on the first, but honestly, I’ve called ecotech about a dozen times over the last month to ask questions and such , great customer service, even if I’m alittle slow sometimes to get what they’ re saying, it’s nice to have an English speaking person on the phone, more times than none when u call , they link up to ur reef link and can see exactly what’s going on faster than u, because of that they are worth every penny!!!!