Hello im New to forum im having trouble eith my tank one fish has died already. But asside from fiah in danger it my plants that are dieing also . My plants like java fern n i think crypts and some rotundafolia are slowly dieing leaves have holes in them n look like its rottin away slowly. Also ther is algea i think its green n stringy like also my sides of glass arr turning green. I do weekly water changes about 30% by the time i do weekly water change my wter level has dropped to juat above half my tank from the top. I have a 15 gal tank so its not to big my light i use is two phillips 13w=60w daylight bulbs light output on each bulb is 900 lumens 13w bulb each. I was told i am using the right bulb by somone on here before. I dont lno wat the problem is i dose flourish exel just a little bit probably about 1-2 ml evry 2 weeks on days i do t do wc. If somone knows wy this is happening plz help me i dnt kno wat to do i research and research i camt find an answer too many possibilities i need expert help. I dont want to lose my planta or even my 2 fish i have left ty anyone for this help.