Jesli chodzi o krasnorosty,to odpowiedz dlaczego w naszym zbiorniku istnieja,jest zlozona sprawa.
Jak wiemy istnieje okolo 2500-6000 gatunkow krasnorostow,wiekszosc wystepuje w wodach morskich,ale 5-8 gatunkow wystepuje w wodach slodkich.
Czesc z nich rozni sie co do odzywiania,owszem czesc gatunkow zywi sie "weglanami" ale nie wszystkie.
Dlatego tez,czy ktos ma "zerowe kH,czy tez zerowe weglany" nie musi miec znaczenia dla czesci gatunkow.
Z histori forum i nie tylko,bylo bardzo duzo przykladow z takimi parametrami,czy tez potaesem...1500/100900,gdzie jak najbardziej nie przeszkadzalo to w rozwoju.Calkowicie pominal bym wlasnie takie typowe akwarystyczne domniemania,a zajal bym sie poprostu nauka.
Jak juz pisalem wczesniej,czesc gatunkow zywi sie weglanami i to fakt,co juz wczesniej bylo napisane na forum,ale nie wszystkie.
(rodzaj Audouinella), większość glonów potrzebuje składników odżywczych, światła, czasu i niezakłóconego środowiska o rozsądnych parametrach do rozmnażania. W naturze BBA często występuje w bardzo czystych wodach o większym przepływie (są one czasami używane jako wskaźniki czystości środowiska). Ponieważ żyją w dość czystych wodach (które zwykle są ubogie w składniki odżywcze), przypuszczam, że może to być powodem, dla którego potrzebują większego przepływu, ponieważ przy wyższym przepływie otrzymują większą podaż składników odżywczych. Z tego co wiem, BBA nie potrzebuje do wzrostu silnego światła (słabe światło też jest dla niego dobre). Czasami mylimy się również, mówiąc o „składnikach odżywczych”. Dla alg „składniki odżywcze” oznaczają nie tylko substancje nieorganiczne, ale także organiczne (wraz z witaminami i innymi substancjami organicznymi). Więc jeśli zapewnisz glonom w swoim zbiorniku wszystkie potrzebne składniki odżywcze i dasz im wystarczająco dużo czasu na ustatkowanie się i rozmnażanie (bez żadnych zakłóceń, takich jak podmiany wody, zjadacze glonów,
rośliny kradnące im światło i składniki odżywcze itp.), wtedy otrzymasz algi na pewno. Ale jeśli masz wystarczająco dużo „niepokojących” czynników w swoim zbiorniku, algea może mieć trudności z utrzymaniem się i dobrym wzrostem. Niektórzy naukowcy twierdzą też, że BBA nie lubi zbyt niskiego pH (poniżej 6,5) => zwykle żyje w przedziale od 6,5 do 8,5.,ale jak najbardziej rowniez wystepuja w nizszym pH.
https://books.google.ie/books?id=IikPwC ... od&f=falseHere are some extracts word for word that somewhat describe different species of freshwater red algae.
In general, freshwater red algae are localized in reasonably unpolluted waters and are infrequent to absent in streams and rivers that are organically enriched, greatly silted, or very high in inorganic nutrients(Sheath and Hambrook, 1990)
Fresh water algae are found in a wide range of oxygen concentrations but there tends to be an increase in frequency of occurence with higher conentrations(Sheath and Hambrook 1990)
94% of fresh water red algae is found in rivers and streams.
The interaction between the Ph and the form of inorganic carbon can greatly influence the productivity and distribution of Rhodophyta(Sheath and Hambrook 1990)
Although wide spread species are found in a wide range of Ph values, the majority occur in mildly acidic waters between ph 6 and 7. However, there are exceptions to this pattern, including Bangia, Chroadactylon, Thoreales and Ceramiales which maybe considered alkalophilers(Sheath 1987)
The effect of Ph can be attributed to the form of inorganic carbon available, some taxa such as Lemanea mamillosa have been shown to use only free
CO2 as a carbon source for photosynthesis which is the predominant form in mildly acidic ph values(e.g Raven et al., 199f)
Above ph 8, the proportion of free
CO2 drops below 2-5% and species occuring in these waters would require flow replenishment or use of alternative sources of inorganic carbon(Sheath and Hambrook, 1990)
One species commonly distributed in high Ph waters is the crustose Hilden brandia rivularis, which also utilizes
CO2 as a carbon source but may also use HCO3-, although this possibility has not been confirmed (Raven et al, 1994)
Freshwater rhodophytes occur in a broad range of nutrient values, but they are more typically found in low to moderate regimes(e.g., PO4*3- below detection to 100mg/l-1)
The common occurence of red algae at low nutrient levels is partually due to flow replenishment and reduction of the boundary layer of depletion riverine systems. In addition, many species form colorless hair cells that may be produced in response to nutrient deficiency, as is the case for some green algal filaments.
Some researches have employed rhodophytes for classification of streams. For example in Austria Hildenbrandia is typical of lowland rivers with relatively high nutrients, wheres Lemanea is regarded as indicative of high altitude streams with low nutrients.
I am more inclined to believe about competition on microscopic level. The book did mention BBA has to compete with other algae like brown diatoms and such and other rhodophyta species too until one prevails. Red ramshorn snails do eat BBA.
coeruleus
clearly preferred strong current. The species seemed unable to initiate a successful colonization in slow current or standing-water conditions. It could however endure such conditions for relatively long periods. This preference for stronger currents was confirmed from the other aquaria in Belgium from which it was reported. Therefore, in our opinion, changes in the current velocity could be used for controlling of the growth of this alga and even for its elimination from aquaria. This approach in combination with efficient grazers, such as
Ameca splendens may prove to be quite successful.
Generally,the species was reported to be attached to the surface of the leaves of
Vallisneria spiralis but could also be found on other aquatic macrophytes with strong leaves (e.g.
Hydrocotyle spp.,
Anubias spp.).
Initial colonisation mostly started on the edges of the host leaves andincreased inward onto the leaf surface. In the majority of the cases it developed epiphytically in Amazone aquaria with pH 6-6.5 (relatively rarer 6.5-7.5), at water temperatures from 24-27°C and always preferred hosts exposed to increased water current. This was mostly near the outlet of the filtering apparatus with maximum output between 1892 and 1900 liters per hour. After decreasing the current velocity by more than 60% a degradation of cells and their content was observed
http://www.academia.edu/10906960/First_ ... rs_BelgiumAnd a bit more about this same type of BBA species called Compsopogon coeruleus.
The below is a study on its ability to use organic carbon as a source and according to that study it's quite capable of taking HCO3- directly without the need to convert to
CO2, unlike other species of red algae who have a preference for
CO2.
A few paragraphs of the article.
Results on measurements of environmental variables (Table 1) revealed that C.coeruleus in this study inhabits a clear, nearly neutral, warm and nutrient moderate aquatie environment. These results concur with previous reports on the algae in the genus.
Compsopogon prefers warmer, nearly neutral or more alkaline and slightly pollutant habitat
(Sheath and Hambrook, 1990; Wehr and Sheath, 2003; Liu and Wang, 2004).
These results indicate that C. coeruleus has a higher affinity for an inorganic carbon source ......
In addition, the present study was the first to demonstrate that C. coeruleus can
directly uptake bicarbonate without the aid of extemal CA-mediated conversion of HC03- to
CO2• This more efficient means of HC03 - utilization may be an adaptation for highly-unstable
aquatic environments (Axelsson et al., 1995).
http://www.google.ie/url?sa=t&rct=j&q=& ... LBJ31F32SQhttp://www.algalweb.net/Photosynthesis and pH/inorganic carbon
Rates of photosynthesis in response to pH exhibited three distinct patterns (Fig. 5): (i) significantly higher rates (F= 6.1–28.4) with an evident increasing trend towards pH 8.5, suggesting higher affinity for inorganic carbon in the form of bicarbonate, as observed in C. coeruleus, A. hermannii, A. pygmaea, B. ambiguum and one population of ‘Chantransia’ (1); (ii) rates not significantly different under the three pH values with higher values under pH 4.0 or 6.5, suggesting affinity for (or indistinct use of) both carbon dioxide or bicarbonate, as found in populations of B. delicatulum, T. hispida and one population of ‘Chantransia’ (13); and (iii) significantly higher rates (F= 5.1–22.

with an evident increasing trend towards pH 4.0, suggesting higher affinity for inorganic carbon as carbon dioxide, as seen in B. vogesiacum".
https://www.researchgate.net/publicatio ... c_performance_of_freshwater_Rhodophyta_in_response_to_temperature_irradiance_pH_and_diurnal_rhythm
Podsumowujac,byc moze byla by potrzeba uzycia mikroskopu z jakim gatunkiem mamy do czynienia.
Dlatego ciezko jest okreslic jak walczyc,co moze przyniesc poprawny skutek.
Spotkalem sie rowniez z artykulem gdzie uzywanie Fe chelatu glukoninanu sprzyja rozwojowi danego gatunku.
U siebie widze od kilku lat scenariusz,jesli przekrocze na danym etapie zycia akwarium ilosc Fe,pojawiaja sie krasne,jesli danego scenariusza nie przekrocze jest czysto.Ale jest to tylko moje spostrzezenie ,ktore sprawdza sie jak w zegarku
Ps.Piotr jest biologiem,na pewno pewien zakres wiedzy rowniez nie jest mu obcy.
Pozdrawiam