Hey all, so I've had my 75g planted tank up for about a year now and while I am decent growth out of the current set up I feel this tank and equipment is lacking a bit, or could be producing more/growing faster (specs below). Im thinking about adding another two 54watt t5 ho bulbs to total at 4x 54watt 6500K bulbs. Any reccomendations or any tips on where to find a cheap 2 bulb fixture? I'm tempted to venture to homedepot or lowes and find a shoplight to throw on the tank. Secondly, I'm considering trying the EI dosing system for macro and micro nutrients. Has anyone tried this system before and mind sharing your opinion? Lastly, I feel like I need a better method of diffusing the co2. The kinda crappy fluval co2 diffuser was just what I had on hand, and want to hear others opinions on what diffusers to try or look into. Here are the current specs. light: currently 2x54watt t5 HO 6500k (on for 10 hours/day) filtration: fluval 306 canister filter with return spraybar. co2: Aquatek co2 regulator with solenoid valve, bubble counter and cheap co2 ceramic diffuser (roughly have it at 2bubbles/second. On an hour before lights, off an hour before lights shut off). stock: 6x Peru Pterophyllum pf. scalare angels 15x black neon tetras (Hyphessobrycon herbertaxelrodi) 3x whiptail cats (Dasyloricaria filamentosa) 2x Corydoras duplicareus 6x Nannostomus beckfordi 2x Silver hatchets (Gasteropelecus sternicla) Flora: Ludgwigia (unsure of species), crypts, Rotala indica, Sagittaria subulata, Telanthera sp., plus a few other clippings and other odds and ends. Nothing demanding I know, but would like to get into the more sensative stem plants or expand the diversity of plants in my tanks. Ideas, tips, comments on anything you would do differently would be appreciated. Cheers!