Of all the facets (to put it nicely) of marine aquarium keeping that turn off hobbyists, likely none surpasses dealing with pest algae. Normal maintenance of our systems can be a breeze; not taking much time or physical exercise, given that time in investigation and proper set-up has been accomplished. However, run-away algal problems can be proverbial plagues... not only ugly to even smelly messes, but a root cause of livestock malingering and loss. The purpose of this book is to share with you how to avoid pest algae problems; and if they do occur, how to identify the source/s, the algae themselves and effectively solve (reduce to eliminate) noisome, unwelcome algae from your tanks. Avoiding Algae Problems: From the start, I want to impress upon you that while algae presence to some degree is entirely natural; to be expected in all systems suitable to support aquatic life; and the situations where there is an overabundance of undesirable species biomass is not! To put this another way; DO expect some appreciable algae presence/growth in any/all viable aquatic biological systems; and DO be aware, observant concerning their over-proliferation in your aquariums... pro-active in limiting their over-abundance; for several good reasons: Pest algaes penchant for overgrowing/crowding out other desired life, using up too much of nutrients and minerals you may want/need for other chemosynthetic, photosynthetic life; and importantly; to limit the amount/concentration of metabolites these algae produce that may mal-affect your livestock; sometimes profoundly.