Hello every1 The last couple of months, my plants has started to look awfull and im also getting BBA algea (think its BBA atleast). Setup is as follows: Tank ( been established since june Â´08) : 260 liters Lights: ati sunpower 4x54 w, with 9 hours of photoperiod total, split on 6 hours of 2x54 w and 3 hours of 4x54w. Ferts.: 3x a week., macro 3/4 tsp KNO3, 1/4 tsp KH2PO4, 1/4 tsp K2SO4. micro easylife profito 3x 15 ml. Co2: via glass diffusor. 1 hour prior lights come on, and 1 hour before lights go off. Dropchecker is limegreen/yellowish the whole time lights are on. Flow: tetratec ex 1200, tunze nanostream 6025 powerhead. ( cleaning the canister every 45 days apprx.) 50% waterchange every sunday. The plants are looking rly dull, and all the new leaves they make soon gets curly and brownish. I thought about magnesium diffiency, but according to my watersupplier, the tap water should contain 20 mg/l. So that should not be a problem after all? picture of the curly leaves on my brown crypt: http://s480.photobucket.com/albums/rr16 ... 8x1056.jpg Whole in leafs: http://s480.photobucket.com/albums/rr16 ... 8x1056.jpg http://s480.photobucket.com/albums/rr16 ... 8x1056.jpg a pic of the BBA: http://s480.photobucket.com/albums/rr16 ... 8x1056.jpg What can i lack or do wrong? Cheers from Christian, Denmark.