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So far Udo has created 260 blog entries.

December 2021

Western Spadefoot


Spring is the time for frogs. It is the time when the singing for mating activity in lakes as well as in biological pools begin. But not all amphibian species wait until spring. The Western Spadefoot, Pelobates cultripes, is an example of these. This species starts looking in autumn for waters as birthplace for the next [...]

Western Spadefoot2021-12-01T10:03:28+00:00

November 2021



Watching an otter is a very difficult task. They are shy mammals with twilight or night activity. But they are visitors to some biological pools in Southwest Portugal, as this photo shows, which shows otter waste on the shore. Otters are clean animals, leaving their feces on the bank and not in the water, [...]


October 2021

On the way to Africa


It is now, in the months of September and October, when we come across birds by the biological pool that are not there for most time of the year. They are small, not very shy and do what the resident birds do not know how to do, they are perching or climbing a reed [...]

On the way to Africa2021-09-29T14:46:56+01:00

New type of wooden jetty


A new type of wooden jetty is presented, developed by the team at Bio Piscinas, Lda. and carried out by experienced specialists from SHB, Lda.  The new wooden jetty model applies to new constructions as well as in cases of renovation of existing wooden jetties. The new wooden jetty combines wood and aluminum. Aluminum [...]

New type of wooden jetty2021-09-29T14:31:49+01:00

Attention! Fraud!


"Piscinas biológicas", what means Biological pools, is a brand of great value and reputation in the country. Piscina biológica, our expression invented almost 30 years ago with the intention of finding a name for our product and since then associated with the work of an experienced team designing high quality projects. The product is [...]

Attention! Fraud!2021-09-29T15:09:23+01:00

August 2021



Between mid-August and mid-September we will be on diving station ... holiday with biopool! We ask for your understanding that we cannot answer phone calls or respond e-mails during this time. We'll be back to surface in September. Until then, good baths! home / news [...]


Freshwater fish


The few freshwater species that exist in Portugal live in streams or flowing rivers, in other words, in conditions that are very different from those of a biological pool. Almost all of them are registered in the Red List, because they are rare and the destruction of their habitat and/or the pollution of streams [...]

Freshwater fish2021-08-01T16:09:29+01:00

July 2021

Harvest of water lilies


One kilogram of fresh aquatic plant biomass contains 1 gram of phosphorus. As phosphorus is the limiting element for algae growth in an aquatic ecosystem, we can say that collecting and composting 1 kg of withered water lily leaves and flowers exports 1 g of phosphorus out of the biological pool ecosystem. In theory, [...]

Harvest of water lilies2021-06-30T18:04:57+01:00

Enchanted frogs


The mere fact that amphibians sing, especially frogs, is widely known. Frogs in biological pools are no exception. But why do they sing? The season of most concert activity is obviously spring. For many of the species there is a direct link between water temperature and song intensity. Singing takes a lot of energy [...]

Enchanted frogs2021-06-30T18:06:33+01:00



Admiring the underwater world is something that many people would love to do, but not all of them want to place their heads underwater. It would be necessary to wear a mask, to see everything. But to stay underwater for more than a minute you already need scuba diving equipment that weighs in kilograms [...]

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