zeolith sten?

[Meeloo]

Nogle der ved noget om zeolith sten?
Jeg er med på at de er med til at holde ammoniak nede og kan muligvis også hjælpe på fosfat.

Jeg ved ikke så meget om det og vil gerne vide mere om der er dårlige og gode sider af medaljen

Kender du noget til zeolith sten?

på forhånd tak

[ole kekkonen]

jeg var moderator på zeovit forum i et par år og kender det godt,dog vil jeg mene det ikke er så effektivt at man behøves købe bakterier og hele pakken.og glem alt om at jeg kun vil bruge en metode på min balje resten af den eksistens,nærings kontrol for mig er simpelthen at inføre forskellig habitat og organismer der får akvariet til at ligne det jeg vil mene hvordan et rigtig koralrev ser ud.
jeg syntes zeolith har potenser og muy interesante mineraler samt brugbart,jeg syntes probiotic er muy interesante samt brugbart jeg syntes det mudder/sand man kan købe på pakker (standard DSB) er muy interesante samt brugbart i akvarier.når det er sagt ligger sorteper omkring industrien der bygger på dem og hvordan det i virkeligheden virker der er tons af info om zeolith på nettet det kan enda købes i flydende form til mennesker der skulle gøre godt.zeolith “virker“ men måske ikke helt som det står på pakken,det kan have noget med dannelse af biofilm at gøre og manglende k+(kalium){vær opmærksom på at potassium er det på engelsk og et helt andet middel }.
det er helt sikkert bedre end biobolde,keramik og stumper med levende sten osv.i en zeolith reaktor

[ole kekkonen]

et citat fra murraycamp

Zeolites are a class of alumino-silicate minerals. A particular "species" of zeolite, clinoptilolites, are used in marine aquarium filtration systems and form the core material of many commercial probiotic systems, including Zeovit, Ultralith and Neo Zeo.
Some of the manufacturers of these systems claim that clinoptilolites adsorb significant quantities of ammonia and/or ammonium, purportedly taking these compounds out of the nitrogen cycle, enhancing nutrient reduction. There has been considerable debate as to whether this statement can be true, as the thermodynamics involved would result in nitrogenous ions being replaced in the very short term by other ions, at least in seawater.
This recent study sheds light on this controversy, and confirms that clinoptilolites in seawater are not as effective in absorbing ammonium as in freshwater. From the article:
The ammonium-exchange kinetic curve of zeolite is shown in Fig. 2. Ammonium exchange speed of zeolite in the seawater was quicker than in fresh water. There were K+, Ca2+, Na+ and Mg 2+ and so on metal ions in seawater, when ammonium was exchange with zeolite. These metal ions reacted with zeolite, but some were replaced by NH4 + ions immediately. It increased exchange speed relatively rapidly to fresh water. And some active sites of zeolite, which could be exchanged, had not been re-replacement of NH4 + ions, so that the final ammonium uptake of zeolite in seawater was less than the amount in freshwater.
. . .
The ammonium uptake of zeolite in seawater was less than fresh water, because of the competitive exchange of metal ions in seawater. The equilibrium curve fitted to Freundlich isotherm equation better. The ammonium exchange speed was quicker than in fresh water and the ammonium-exchange kinetic curve were described with the pseudo-second-order kinetic model.
What this all means is that zeolites do not effectively sorb ammonium from the water column, and any statement to the contrary is questionable, at best. However, they are an extremely effective media for biofilm development and the nutrient processing enhancement (i.e. effectiveness) that robust heterotrophic bacteria growth can effectuate. I have tried other media - LR rubble, igneous media (Seachem Matrix) and other media - with a carbon dosing system and the difference in effectiveness (much less effective) was obvious. There has to be another process at work in zeolite-based systems that supports their effectiveness in terms of nutrient reduction. Perhaps iron in the particular sources of zeolites used and its impact on iron reducing bacterial species - but that is just speculation. Long story, short: zeolite based systems are extremely effective at nutrient reduction, but not for all the reasons advertised.
The article also stated:
The effect of the major metal ions of seawater on the ammonium uptake followed the order of preference K+ > Na+ > Ca2+ > Mg 2+.
This last bit is instructive. The authors found that zeolites preferentially sorbed potassium over the other major ions in seawater. One major hazard in zeolite-based probiotic systems is substantial, and rapid, depletion of K+ levels, leading to tissue necrosis in corals, and other bad effects. If anyone needed a "smoking gun" to identify the culprit, here it is.
Kan Fu, Zhong Li, Qibin Xia and Tongchang Zhong. Change and improving of ammonium exchange capacity onto zeolite in seawater. 2011 2nd International Conference on Environmental Engineering and Applications IPCBEE vol.17 (2011).

samt hans artikkel om probiotic
http://www.coralmagazine-us.com/content ... emystified