i have recently began caring for fish and plants..i think ive finally realized how to care for fish but the plants have been a whole new learning process...ive spent much money tryin to perfect my tank to my likings and have overspent after of course reading a little on what i was doing wrong.....this is the problem..i have a 29gallon tank..i have a t-8 flourscent 20w lifeglo bulb..i have ecocomplete substrate as my base for the plants..i do not have any type of co-2..i have around 8 anacharis..copragrass and a few others i cant remember the name...plants were doing good for about 2weeks and now my anacharis' leaves are dying off and they are breaking apart everyday..some still look healthy but the others are slowly withering away..my copragrass hasnt grown a bit and from my understanding they spread across the bottom of the tank fast...whats odd is that i bought some cheap bulbs from petco and through in there and they are growning very fast..i keep my temp around 76-78bc of the fish i have in the tank...my question is do i need co-2 and havnt fully understood how to measure the watts per gallon when it comes to lighting yet...is the problem my light, substrate, or lack of co-2