Rather than continuing to add CO2 until you get perling, suggest you use the
calculator on the attached.

http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

Lots of reasons why even with appropriate co2 you might not get perling.

Agreed. In fact, I've never gotten pearling with only 2 watts per gallon, no
matter how much CO2 I added.


Leigh

http://www.fortunecity.com/lavender/halloween/881/