(I checked back through threads and found one that was related but didn't really help me. So...)
My Pistia stratiotes/water lettuce has gone haywire. It started with yellowing/browning then melting of older/bigger leaves here and there. It wasn't too many of them, and I wasn't worried. They were making daughters and seemed pretty happy. Then yesterday they all seemed to fall apart. All but the smallest plants started losing their roots- on some the entire root would fall off, on others the "feathers" would fall off the roots. More of the older/bigger leaves were browning and melting. My tank was a mess!
And I'm not sure why its happening. The pistia is an integral
part of my scape, and soon they'll be gone from my LFS, so I'm trying to figure this out ASAP. Any help is appreciated!
If it helps, pertinent info from my 55g log:
My water from the tap
is pH 8.6, moderately hard (~15 dGH per city website). My tank
pH is 7.4 naturally. I'm planning to lower it to around 6.5 in the future.
My lighting is a poopy 48" T12 that is WAY old. It is on for 12 hrs/day. I was thinking of getting a new bulb soonish, but I was really enjoying the holy trinity- long light duration, good plant growth (on the Val, at least), and low to no algae.
9/8/11 Pistia was added, started lights at 12 hrs/day, temp ~73 degrees
9/16/11 filter started, heaters started, temp set 77 degrees, seeded with used gravel
9/23/11 fish added
9/24/11 dose 4.6mL Flourish Comp
9/26/11 NO2-=0.5 ppm, NO3-=2.5 ppm, did 40% WC
9/27/11 NO2-=0.25 ppm, NO3-=2.5 ppm, did 30% WC
9/28/11 NO2-=0 ppm, NO3-=2.5 ppm
I've never seen any NH3, I've seen no more NO2- since 9/27, and NO3- has always been at or under 10 ppm until yesterday, where it was 15 ppm before the WWC (probably because of the pistia die back). I've continued dosing Flourish Comp weekly after the WWC. All my other plants (all Vallisneria americana) are doing well except the three that had poor roots to begin with.
I've thrown a handful of frogbit in there to help (maybe?) until I can get this figured out. I also dosed an extra 4.6ml of Flourish Comp tonight.
Any ideas or suggestions? Pretty please and thank you very much!