03-20-2007, 09:44 PM
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A hood with screw-in CF's and 2 25W bulbs will allow you to grow just about anything, and yes, you will be required to run CO2. If you don't want CO2, then 20W bulbs work well or less. I have 2 tanks, 1 with 20W and no CO2, and one with 25W bulbs, and it has CO2. I tried the 25W without CO2 and algae took over. Started from scratch and added CO2, no more algae, or very minimal. And yes, you can grow any ground cover with it, IMO. HC grows rather fast with the 25W bulbs. You just need to find the proper bulbs, and make sure they are either 6500k or 6700k. Not the 3000k. Also, IMO, 20W bulbs puts you in medium light and 25W puts you in high light. And this does account for restrike, and what I'm able to grow in both tanks.