negli istituti di biologia universitari , TETRASELMIS, PORFIRIDIUM, CLORELLA, NANNOCLOROPSIS, oppure ancora in qualche sito che vende prodotti per acquari alle volte sono in vendita delle “ alghe in sospensione” ). Well yes ... I have often wanted to build a "reactor for plankton" ... and I'm not a fool, for example, keeping alive the phytoplankton (phytoplankton) is not very difficult, if we exclude the difficulty in finding the initial inocula (you pass from aquarium to aquarium, or you can try in institutions of college biology, Tetraselmis, PORFIRIDIUM, chlorella, NANNOCLOROPSIS, or even in some site that sells products for aquariums are on sale at times of "floating algae").
That's why there is someone who not only has built this reactor do-it-yourself simple and bloat or that other, long and lanky , but he has also written an article ... and found it to him that Acquaportal published.
If in fact we are among the lucky ones to not have problems of space and / or appearance near the ' marine aquarium reef, that's quite a reactor, preferably 2 or 3 or more "on battery", it becomes VERY useful supplement to 'Power of the invertebrate, and indeed it is essential for the reproduction of some species of animals!
Think of the tiny fish, or species of corals more difficult to feed, which sometimes require daily manual feeding through "pippetta" ... maybe even in hard to reach areas of the aquarium. In fact, on the basis of this reactor project, we can make one for animal plankton (zooplankton), which will feed with the plant (phytoplankton).

Sale of reactors are also ready and facts, but I must say that the cost is often excessive in relation to the components and if you want you can minimize the complexity, I myself in the past I used the simple bottles of mineral water, tucini Fittings and installations irrigation and the usual aerator. All placed near a fluorescent tube.
But to make things right the 2 progettini linked above are certainly more comfortable in everyday use, especially in small aquariums for the level of "culture" in the aquarium.

Light
Possibly from the sides of a column of water, however, that covers the largest surface area possible, with a photoperiod of 16 hours is sufficient, but 24 is even better!
Aeration:
The aeration allows water to crop to absorb carbon dioxide, which is located in the air in relatively small quantities, but it is necessary for photosynthesis.