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This tutorial introduces photosynthesis

Plants use light energy to make sugars from carbon dioxide - Photosynthesis

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NOVA - Official Website | Illuminating Photosynthesis

Photosynthesis does the opposite of respiration. Carbon dioxide is absorbed and oxygen is produced. In order to study respiration in green plants we must block out the light, because although green plants respire all the time they only photosynthesize in the light.

What are the Products of Photosynthesis ? - BiologyWise

As per the "Walstad Method" (basically, a twist on what was known by old timers as the "German Method"), this method depends upon the plants (along with fish wastes) to do most of the work for maintaining the aquarium chemistry and water quality (as far as the Nitrogen Cycle ONLY) while the aquarium keeper provides circulation, some ferts and mineral cations that are not supplied or kept up with adequately by fish food, and cleanings ONLY when necessary.

Basic products of photosynthesis - Encyclopedia …

Obviously, I am biased toward sponge and fluidized filters. However this does not mean you cannot keep a very successful planted tank without these filters. Nothing could be further from the truth, and this should not be assumed from this article!
What I am saying is to consider these two filters for their simplicity, effect on water parameters, and the fact that many professionals and experienced hobbyists use these with top-notch results. I am emphasizing them because, especially in the case of sponge filters, many aquarists overlook them and focus on the name brand (and more heavily advertised) canister and hang-on-back filters.

Based on my many years of experience and 1000s of aquarium set up and kept for clients, you can have an aquarium that produces enough CO2 via "low tech" methods such as employing filters that do not wear off CO2 (such as the Fluidized Sand Bed) along with use of foods and simple supplements that easily can be qualified as low tech, HOWEVER this still does not mean you can get by with a 15 watt T8 cool white fluorescent lamp on a 20 gallon aquarium for a high light plants.

Photosynthesis — bozemanscience


Another way to utilize NilocG Enhance Seachem Flourish Excel for bioavailable carbon (CO2) in a better, staggered way, rather than all at once, is a calibrated drip system.
In this experiment I was able to get 20 drops per minute. I measured 20 drops and this was equal to a ¼ tsp. So 4 minutes would equal 1 tsp. There are 6 tsp in one fluid ounce. So at this rate you will go through a ounce in 24 minutes. Add the correct dosage for your aquarium size then add the water (RO or DI water is best to mix with Flourish).

Example: For a 50 gallon planted aquarium you would add one capful (5 mL) of Flourish Excel (or 5 mL of NilocG Enhance). Then, depending upon how long you would like to stagger the drip would determine the amount of water. For this example I would suggest 20 oz. of water to mix for 8 hours of drip (24 minutes per ounce x 20 ounces water/Flourish Excel solution).
With larger containers, longer dosing times can be achieved.
However, even though Flourish Excel or Enhance can remain active for 24 hours, from my experience I would suggest 8 hours for best results (keeping in mind that CO2 is not utilized by plants after dark as they use oxygen instead during non-photosynthetic periods).

This is not to say you cannot use a wet/dry filter for a planted aquarium, as I have successfully done so with many client aquariums.
HOWEVER in my controlled tests involving a few of my larger clients where I had dozens of aquariums at my disposal for these tests, the Sponge Filters and much more so the FSB Filter clearly out performed any wet dry filter (this includes exact matches to the popular eshopps wet/dry filters).
To qualify this statement, what really set the FSB Filters and to a lessor degree the sponge filters apart was the fact these filters do NOT wear off CO2 nearly as much as the typical wet/dry such as the eshopps, thus I was able to maintain these aquariums without the expensive and often time consuming advanced CO2 systems, which my clients who wanted as little hands on with their aquariums in between my weekly visits appreciated greatly!

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Converted pre-filters as pictured to the right are another basic DIY reactor/diffuser.
This sponge pre-filter method was introduced to me by an aquarium plant enthusiast friend in 2007, but I forgot about it until September of 2011 (after a similar method reminded me of it and I decided I would put one together myself).

This method utilizes a Filter Max #2 Pre-Filter with a small hole drilled to add a Lee's air line control valve, then an airline check valve as close to the airline control valve as possible. From the check valve, the airline goes to the source of the CO2, whether a Jungle Fizz Tablet Bottle (which is what I used to give it a try), yeast CO2 generator, gelatin, or, in my friend's, case a fully pressurized CO2 tank with a regulator.

You then connect a relatively slow pump such as the Rio 200 (138 gph) to what would normally be the pump pick-up, but in this case, the flow is directed downward so as to trap the CO2.

While, as of this article update, I have not used this method enough to make a judgment, my friend has and has noted marked increases in his CO2 using the same generator method, with the only difference being this DIY diffuser.

Science Experiments on Environmental Education and Biology

For PROFESSIONAL GRADE planted aquarium liquid fertilizer products that are best suited to the "Estimative Index of Dosing".
Products designed for persons who want to have a more advanced planted aquarium without the hassles need for a degree in science to do so. Consider these products too:

These products work for both low light and high light planted aquariums, just different dosages.

Plants are simply placed in water with the necessary chemicals

This is an often misunderstood aspect of aquarium plant keeping.
There is so much anecdotal information that is out of date with more current aquarium/plant biochemistry information. Not only do plants need many of the minerals found in GH, but, just as important, potentially dangerous upward pH swings can occur if your GH is much below 50 ppm during peak plant photosynthesis.
For example, I observed a pH of 6.8 in the morning and then a pH of 7.4 in the afternoon in a tank where GH was low or almost non-existent.
:

Photosynthesis - Song with Free Worksheets and Activities

Hydroponics is a method of growing plants without soil. Plants are simply placed in water with the necessary chemicals. As plants are deprived of support from the ground, they will fall down. To support the plants, an inert material like expanded clay pebbles is used in a pot in the tank (figure 5). Before inserting a plant in a hydroponic system, you must carefully remove all soil from the roots otherwise bacteria will putrefy them.
For many houseplants you can use tap water. Though, particularly for vegetables, it is advised to add appropriate nutrients. This cultivation method has the advantages of both requiring less frequent waterings and using very little water. With this system you can grow nearly any houseplant or vegetable. Hydroponics is useful also to show what nutrition plants need.
1 - Place some houseplants in hydroponics.
2 - Try hydroponics with vegetables and find the suitable nutrients.
Hydroponics in the Classroom
Hydroponics Module
Bradley Hydroponics
Growing plants without soil
To teach orphaned children how to grow their own food with hydroponics (gardening that uses very little water).
Organic Greenhouse Vegetable Production
Internet keywords: hydroponics classroom.

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