I do have to clean the glass in my main every 2-3 days, it's getting green, but my back wall glass never gets bushy! My PO4 reads 0, NO3 reads 0 (according to API test kits)! That red stuff were only in my refugium, growing only on chaetomorpha which i totally removed and left a small clean chunk to grow! The first two pictures show that red and green algae in the corner, that is the only algae spot in my whole system! Besides the green glass every 2-3 days, there's now green/red growth in my main!