:;hi2 I have been back in the game for about 2 years now. over 30 years ago I had a 2.5, 5, 10, 15, 25 and a 55 gallon long tanks. But I guess things changed and it all stopped till now... I find that what I knew then is nothing now. I have been reading and asking questions on several different sites, but I keep getting conflicting answers. That makes if very hard for "ME" to learn. I just reset up my 30g with all live plants. Rotala Indica Java Fern Water Wisteria Cryptocoryne Amazon Sword. I have a T8 17watts full spectrum bulb. I use 5ml liquid co2 with liquid fertilizer from flourish daily. I am getting growth. But nothing fantastic and am getting the odd yellowing and a brown sedement and a type of fluff on the leaves and a rotting at the base of the Indica and wisteria only the 2 on the left side.