Hi all, I have been lurking around these forums reading for awhile but this my first post! Loads of great information here which I have been trying to absorb into my brains over the past few weeks. I am pretty new to fishkeeping, set this tank up in November and have enjoyed blundering my way through since then. It is a 10 gallon Betta Lifespace(?) which I found second hand via the classifeds. Currently - Eheim Aquaball 60 Filter with diy co2 attached to the output 2x 8W T5 bulbs (no other information about these, the manufacturers literature is terrible, one is white one is blue!) I dose with the recommended dose of Excel three times a week Has a sand substrate with root tabs 30-40% water change every week I have only gone for plants that recommended for low light (only 1.6 wpg atm) and everything seems to be fine. My questions are.... Do I need co2 at all with the low levels of light? Again would dosing with ferts be worth it?