[cousinkenni]

Hey guys,

Sorry for starting a new thread

I posted this same message on plantedtank.net, however no one has posted a reply. So I was was hoping someone in this furom could help me out.

For the last two years I have been growing my plants under a single 96W 10,000K/470nm custom sealife bulb and they have been doing great.

Last week I changed the bulbs to one 55W 6700K and one 55w 9325K. All my other plants are doing great, even better than under the 50/50 bulb (Ludwigia glandulosa, Heterathera zosterfolia, Hemiathus micranthemoides, Glossostigma, Rotala sp. green, anubias Nana, Anubias petite, Eusteralis, Tiger lotus, and Lileaopsis). However, my Rotala macrandra doesn't seem to like the light change.

The new leaves of my rotala turned a really dark pink over a three day period and the lower leaves turned green. It seems as though the growth has stopped also.

Could this be due to a sudden change of the light spectrum from a more blue to a more red spectrum?

Any information that you guys have is greatly appreciated.


Kenneth Takeuchi

 

[cousinkenni]

Shalu,

My fear is that it is the opposite, the Rotala are now not getting enough light. Compared to the 50/50, the 9325K should actually have less usable light to Rotala macrandra shouldn't it? The 9325K has a huge peak in the red zone, another smaller one in the "yellow" and one in the blue wavelengths. Rotala Being a red plant, reflects light in the red spectrum.

On the contrary to the lack of nutrients, wouldn't my Eusteralis show signs of deficiencies before my Rotala? At least that is the way it has been in the past for me. My Eusteralis isn't showing any signs of nutrient deficiencies, plus it is more colorful (pink red and purple) than it has ever been.

Thanks for the input though, I didn't think anyone was going to respond.

Ken T.