my tank is located in an area that recieves no direct sunlight. none. period. it is actually in a shady area on a landing going up the stairs and works great illuminating this area at both during the day and at night. i turn the lights on in the morning and off again at night. the tank has been running almost three months, one month fishless cycling and two with fish, 16 cichlids and two upsidedown catfish in a 55 gallon. my readings are always good and have had no probs with ammonia or nitrites since my fishless cycle completed. my problem is, i have yet to see any algae on my glass. anywhere. i check every day when i do my "head count" and after three months there still is no algae. could this indicate i have a prob?