Didn't know thatGBRs need 27-28+ really, similar to discus, I've heard some people say that they're even more sensitive but thats not to say that easycarbo is effecting them, because I don't think it is.I used to keep my Bolivians at 25C just as I do with all fish. lol
So we have 1 theory to add now.
Some required reading for you Mark, These could be another problem you have. Just when you were searching on O being lower in higher temps, Co2 is too and therefore the light vs CO2 is multiplied further!!!
http/www.barrreport.com/showthread.php/6189-Water-temperature-affect-on-plants?
http/www.barrreport.com/showthread.php/5478-how-does-hight-water-temp-affect-the-need-for-ferts?
And to show you I have no problem with Ego. Her is me being told that I was wrong suggesting the 'minimal surface turbulence' in non CO2 tanks reasoning. That is nerly 2 years ago lol. long before I went non CO2.(need more data etc
http/www.barrreport.com/showthread.php/5107-Non-CO2-methods-to-ripple-or-not-to-ripple?
AC
I'm not that knowledgable when it comes to getting plants to thrive so please correct me if what I say below is confused:
The poster of the first thread you mention states this: "I understand that light drives CO2 uptake and in turn CO2 uptake drives nutrient uptake". It's also mentioned that higher temperatures increase the metabolic rate of plants. He queries whether the light is insufficient to provide energy for the plants at their fast metabolic rate.
The poster of the second linked thread states he/she is running a Discus tank at 28/30 degrees C. Its mentioned that an algae issue arises when not enough nutrients are dosed.
From reading the two threads, it sounds like high temperature increases plant activity and so does the light but there isn't enough C02 (in my case, liquid carbon) and macro-nutrient/micro-nutrient dosing to keep up with the plants demands.
Surely then, If I provide lot's more micro/macro nutrients and liquid carbon to cope with their demands, the beneficial plants (maybe I need more???) will be extremely healthy and out compete the algae.