Originally Posted by Autumnsky
The split photo is, in my experience a better method for preventing algae growth. Not really just for CO2
to build up, though I can see the thoughts behind that reasoning. Algae needs a longer photo period so the shorter length helps prevent it from multiplying/growing.
As far as the benefit for a high tech set up I can see it as a benefit for not growing algae. But as mentioned so eloquently by Caleb, if the levels are balanced with everything, maybe not necessary. Nice bit of info Caleb.
Siesta works great in a low to medium light, planted no tech tank set up with low to medium low use of ferts (letting the fish do a bunch of the work there with liberal feeding and good filtration) in my experience from the algae point of view. I can have my lights on for 12+ hours no algae issues. Though not the type of tank set up Delapool has.
Thanks Autumn but I haven't seen caleb on here for while now 😂
Again I don't know how much truth is in the claim about algae needing longer photoperiods. I suppose they do in a way as light is the main driver for algae because they need so little of the other things. Like Mr Barr says. Plants use light to make food for storage and growth whereas algae are single cell organisms who live for the here and now...light.
All I know is that algae falls back when plants are healthy. If you have healthy plants then your success may have nothing to do with the siesta period. Or maybe your plants are healthier because of the higher levels of carbon? If you remove the siesta period, longer light exposes the lack of carbon, plants become unhealthy and so algae ensues so is this excess light or lack of carbon. I know what Tom would say and it would almost definitely be lack of carbon. People think that those of who blub on about carbon are exaggerating but we are not. The point is not that increasing carbon directly smashes algae in to oblivion but more so that it increases plant health which reduces algae.
There are hundreds of thousands of species of algae yet we only see the same handful in our aquariums, why? Because these are the ones that can exploit this niche where we have presented conditions favourable to algae and this is normally when there is lots of decaying matter that is broken down by bacteria releasing nutrients in to the water. Why is there lots of decaying matter? If your plants are dying they lose leaves decay. Algae ALWAYS attacks older dying leaves first. Keeping you tank clean and free of organic matter and debris and providing your plants with unlimited nutrients, ample co2
and adequate light in my opinion drives algae away and this can be done in low tech tanks without a siesta. But can be done with one too so is it necessary and are there any real benefits? Again there is no evidence to support it but no evidence to say it does any harm. Definitely not required in a co2
Edit: decaying plants releasing nutrients may not be accurate but rather chemical triggers during this breakdown that induce algae.
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