no unfortunatly not but last week started gaining their color back, and seem to be doing so rather rapidly. i started using kalk last week also and my parameters no longer swing from day to day. has held completely stable for 7 days now. so maybe that has helped also. at the same time my nutrient level is really low. 0 phosphates and 1ppm nitrate. used hannah checker and red sea pro for nitrate. i think that may be too low though.