Here's the story, I moved my 20 gallon setup into a 30 gallon setup with all my plants, fish and substrate. I had about 2.2 WPG and Nitrates where at about 10 PPM before a water change. I had a 2L DIY CO2 bottle hooked up to a Hagen ladder and the extra bubbles that didn't get diffused where sent to a powerhead to get a 2nd chance at diffusion. I had Dwarf Hairgrass, Dwarf Sag and Corkscrew Vals at the time. I had about 1 new runner from the Dwarf Hairgrass' main runner every 2 days and a new runner every 4 days from the Vals and Dwarf Sag.
One day, the CO2 bottle fizzled out and I didn't get a chance to replace it until 3 weeks later. The runner plants almost stopped growing during that time. When I did replace it, I replaced the 2L bottle with a 3L bottle with the same propirtions of ingredients using the same diffusion technique. Its been 2 weeks since I replaced the CO2 bottle and only my Vals have been growing at a pace of 1 runner every 4 days, like usual. My dwarf sag and hairgrass have not been growing at all. I even added HM and they haven't even been sending out runners at all either.
So I have 2.2 WPG, Photoperiod of about 12 hours, No ferts, 3L of DIY CO2 with a 1.5" playsand substrate. All my other plants have been growing great, having needed to trim acouple of times a month. I have Java moss, Anubias Nana, Moneywort, Ludwigia Repens, a type of Hygro, Pennywort, and Corkscrew vals that are growing just fine, why aren't my runner plants growing?
One day, the CO2 bottle fizzled out and I didn't get a chance to replace it until 3 weeks later. The runner plants almost stopped growing during that time. When I did replace it, I replaced the 2L bottle with a 3L bottle with the same propirtions of ingredients using the same diffusion technique. Its been 2 weeks since I replaced the CO2 bottle and only my Vals have been growing at a pace of 1 runner every 4 days, like usual. My dwarf sag and hairgrass have not been growing at all. I even added HM and they haven't even been sending out runners at all either.
So I have 2.2 WPG, Photoperiod of about 12 hours, No ferts, 3L of DIY CO2 with a 1.5" playsand substrate. All my other plants have been growing great, having needed to trim acouple of times a month. I have Java moss, Anubias Nana, Moneywort, Ludwigia Repens, a type of Hygro, Pennywort, and Corkscrew vals that are growing just fine, why aren't my runner plants growing?