Fernando, All who have responded to your e-mail have given good advise. I will expand on it just a little. You need to do reasearch. Research everything you can about planted aquaria and find what works for you. I found an amazing book that has helped me to maintain healthy plants and fish. The book is Ecology of a Planted Aquarium, by Diana Walstad. It is filled with information that is immeasurable in value. You will find it at the AGA website. Oh yeah, there is a whole chapter devoted to algae, read it. Sam ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/