Thanks for the compliment. I actually set it up as a reference for myself as at the time there was so much conflicting advice around.ceg4048 said:I think JamesC did a smashing job with his website. It's a great reference.
I read about this on the Dennerle site: (http://www.dennerle.de/EN/HG10.htm) and am trying it out at the moment - I wanted the lights on when the kids come home from school for lunch (quaint Swiss custom) so they can feed the fish but I didn't want them on from midday until late evening (I like to look at my tank in the evening). I'm not seeing any algae but I _think_ it is slowing plant growth, however, its only 2 weeks since I started TPN+ so maybe the plants are still adjusting to that...ceg4048 said:That is also why "noonday siesta" does not work. This is a transient condition which only helps algae.
Right, I think this is the same effect that causes Cryptocoryne rot, for example?As far as I can tell, the ammonia ejection ... is a structural breakdown and loss of nutrients and ammonia across the cell walls.
Ah ha! So if we have a high light tank with CO2 is this the same effect that means you get algae everywhere? Is the benefit of CO2 that the plants get going nice and quick and tidy away the ammonia is short order? Or is there anther factor I am missing?Any nutrient deficiency (not just carbon) causes this breakdown of various systems within the plant. Growth is disturbed while the plant attempt to reconfigure for the new set of environmental conditions.
I think the Siesta is putting a slight brake on my plant growth, although I'm not noticing any new algae, will let it run for another fortnight and see - like you say - maybe they don't appreciate the interruption. What about midday bursts, anything to support them?What I'm saying is that there is no data that shows the siesta improves plant health or growth at all. Since health and growth are the key priorities siestas are counterproductive in this regard.
Well, we're talking in general here. I'm not sure that I fully understand the mechanism of Crypt rot. What is bizarre about crypt rot is that it's not usually accompanied by algae on the melting leaves I would be on thin ice if I offered the theory that it is the crypt that decides to jettison the leaf based on what it perceives to be unfavorable environmental conditions and that it pulls the chemicals away from the leaf in a similar fashion as autumn leaves. On the other hand, a crypt that is unhealthy due to poor carbon or nutrients has algae growing from the leaf without the leaf melting so the rotting/melting seems to me to be a different story.rayi said:Right, I think this is the same effect that causes Cryptocoryne rot, for example?
A high light tank is an unforgiving environment. If CO2 or nutrients are inadequate the breakdown occurs and the algae are triggered. Since the light is high, algae production is accelerated in the same way as plant growth is accelerated by high light. The difference is that algae don't require the quantities of nutrients the plants do but if nutrients are available this will add to the acceleration. Algae are opportunists. Ejection of ammonia and nutrients at the leaf site explains why algae typically attacks the suffering leaf first.Ah ha! So if we have a high light tank with CO2 is this the same effect that means you get algae everywhere? Is the benefit of CO2 that the plants get going nice and quick and tidy away the ammonia is short order? Or is there anther factor I am missing?
Well it wouldn't surprise me at all if turns out that the siesta actually results in arrested development. No light=no photosynthesis=no carbohydrate production. If someone did a test of 100 of tanks, 50 of which showed significant improvement with the siesta, and if they provided statistically relevant proof I'd have to reconsider my opinion but it just doesn't seem to fit the science model as I understand it.I think the Siesta is putting a slight brake on my plant growth, although I'm not noticing any new algae, will let it run for another fortnight and see - like you say - maybe they don't appreciate the interruption. What about midday bursts, anything to support them?
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