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Three quick questions. :)

This is a discussion on Three quick questions. :) within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Ok. It may have been a little more than 10 hours though so 9 hours might be a decent drop. What happens if you ...

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Three quick questions. :)
Old 05-03-2010, 02:28 PM   #11
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Ok. It may have been a little more than 10 hours though so 9 hours might be a decent drop.

What happens if you drop the lighting too much? How do you know if you need to increase it?

It is subulata. It's barely growing any new leaves. Everything else, in my opinion, is growing about maybe medium slow. Maybe the root tabs will help.

Also I mentioned it being a T12 as I know those are less strong. I bought it only 2-3 months ago.
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Old 05-03-2010, 02:44 PM   #12
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What happens if you drop the lighting too much? How do you know if you need to increase it?
Plants require adequate light to photosynthesize: adequate means sufficient intensity and duration. The nutrients have to balance the light. Plants will photosynthesize (grow) according to the law of minimum, which is that the requirement that is in least supply is the point which determines when plant growth stops. When light exceeds what the plants can utilize, because the nutrients are not sufficient for them to continue to grow, algae uses the light and takes advantage.

If the light is too little in intensity, the plants cannot manage to photosynthesize (grow). Similarly if there is insufficient duration. I don't know the specific point at which growth would cease; but the siesta method of having the lights on for 5-6 hours, off for 2-3, then on for 5-6 works because plants can use the 5-6 hours to grow but algae interestingly cannot do so as successfully. Most authors I've read suggest a minimum of 8 hours is the limit.

We learn much from regular observation. An occasional yellowing leaf is not a problem if the plant is sending out new growth and the new leaves are good. The new growth, its appearance and rate, is what I monitor.

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Old 05-03-2010, 02:51 PM   #13
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Thanks. I notice some brownish algae on more leafs than I realized. I'll cut back on the lights and try to get a timer. I'll let you know how it goes. :) Will the algae just disappear? Or stop spreading?
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Old 05-03-2010, 04:22 PM   #14
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What is now there will not go away unless you remove it. The light reduction should prevent it from increasing further, and if this works, I would then remove some of what is there.
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Old 05-04-2010, 10:26 AM   #15
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Just wanted to add, I have good luck with wal-mart timers...

If you set it for 10pm, it won't change until about 10:30, but a 30min delay for the on and the off balances out.

Have to be careful with digital timers. They tend to make CFLs burn out extremely quick, and tubes to a lesser extent.
Digital timers let a tiny amount of current go through the device 24-hours a day, as an internal mechanism to see if something is plugged in or not. Some light systems don't like that.
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Old 05-04-2010, 04:43 PM   #16
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:/ oh, great.

The timers I had were "Brinks" and apparently they have a monopoly over timers at my walmart. Even the digital one was brinks. Every mechanical timer I bought (total of 3) got stuck trying to click over...... I hope it doesn't burn out the bulb. :/ But if it burns it out a tad quicker I don't mind. Bulbs are cheap. But I don't want it to lose its intensity unknowingly.

I bought the digital one and have it set for 1:30 PM-10:30 PM, 9 hours. We'll see how that goes. Thanks byron and redchigh! :)
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Old 05-05-2010, 08:40 AM   #17
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The new digital timer didn't work... I am really confuseddd because I fail to believe all of their products can't work... and because it didn't work I accidently ran the lighting for 16 hours or so yesterday. I asked my mom to check if it went off, but she forgot, and I woke up in the middle of the night with it still on. T.T; I went to bed really early is why.
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