Streetwise Posted July 30, 2020 Share Posted July 30, 2020 I wanted to add a bit more about why I like dual siestas, but I thought the topic should be separate from the Fluval 3.0 lighting thread. My dual siesta reasoning is 90% human, and 10% for a little bonus in organic soil Walstad tanks. I am not trying to promote it as a special formula for fish rooms or all tanks. I rejoined the hobby in 2018, after running marine tanks for a while until 2011, and under-gravel, plastic plant tanks as a kid. I spent a lot of time researching lighting, especially after I setup my first organic soil tank, and started to understand the balancing act between light, decomposition, algae, and plants. The corner case I was trying to solve involved the following: Organic soil Walstad tanks, bedroom setup, weekday enjoyment vs weekend enjoyment, and algae vs plants. I wanted to be able to grow my plants, let plants out-compete algae, and see what was happening when I was in the room, without disrupting anything. I could setup a weekday schedule, which was frustrating for weekends, or the opposite. There was no way to do a consistent 6-8 hour schedule without missing a ton of tank-viewing time. Before we got Fluval Pro Mode, I watched a few of Bentley Pascoe's videoes about using timers to trick the lights into more control points by resetting to midnight on a power-cycle. I also started reading Diana Walstad's book at the same time, where she discusses soil decomposition, CO2, plants, and algae, as well as siestas. My understanding is that plants ramp up photosynthesis faster than algae, so every slice of darkness-to-light favors the plants for a certain amount of time. In the meantime, with an organic soil substrate, the darkness allows for more production of CO2 from decomposition. The CO2 from decomposition is much lower than CO2 injection, but it is real. Once we got Pro Mode, I tried to find a way to slice up the time schedule so that I could get the equivalent of 6-8 hours of sustained light in a broken-up format, so I could wake up with my tanks at 07:00, enjoy them throughout the day, and have one hour of 1-2% blue from 21:00-22:00. I am getting 6-8 hours of normal light in 14-15 hours. That is what I tried to do with those schedules. I had to use triangle peaks rather than sustained peaks, since we don't have enough set points, but if you were to slide those triangles together, and overlap the middle ramp-ups, and ramp-downs, it would look more like a regular 6-8 hour schedule. I measured the pH changes with my Apex, along with temperature changes. Cheers 2 2 Link to comment Share on other sites More sharing options...
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