in my experience, chaeto that breaks off is unhealthy. it really loves light and flow. i have a 12x 18 chaeto grow area and it is lit by 96w powerquad, and 1000ghp of flow....if you dont have that much flow, use a powerhead, and flip the chaeto 180 degrees once a week, this should keep the chaeto from flaking off..lastly, chaeto is the best, and easiest to work with...i would not switch it.....more lastly, make a prefilter with some surface area to catch bits of cheato before it enters the pump.