[SupeRGippO]

Roberto, perdonami ma di scenziato qui per ora mi sembra ci sia solo tu...

qui ci sono persone che usano le rowa da una vita ed hanno sperimentato tutto.
La rowa dice di lavarle per l'uso in letto fluido...

ecco un estratto del sito con le regole fondamentali...

ROWA®phos Tips

Follow these simple tips for effective and carefree usa of ROWAphos:

Always wash ROWAphos for fluidized use! Rinsing ROWAphos when used in a filter bag is also recommended.
ROWAphos must be kept damp at all times; it is not effective if it dries out. Therefore, always replace the lid if not using all of the container
Place product in the supplied mesh bag, or between two layers of filter wool for a canister filter
Do not sprinkle ROWAphos directly into the aquarium
Never place ROWAphos into water without surrounding it with filter wool
When ROWAphos is used in a canister, it should be possible to measure zero phosphate leaving the canister; the flow should be turned down until that is achieved
It is important that the white filter bag provided on some sizes be kept clean at all times; otherwise water will not flow through the ROWAphos media inside
In saltwater aquariums, it is very important to always keep phosphate levels below 0.015-0.03ppm

NOTE: Use of larger quantities of ROWAphos may temporarily lower the alkalinity and pH within the aquariium. Monitor the pH and alkalinity levels when ROWAphos is first introduced to an established aquarium with high phosphate levels.

poi se ti piace l'acqua marrone fai come ti pare... ciao ciao

p.s.se fai una ricerca tramite l'apposita funzione trovi decine di discussioni sulle rowa ed il loro utilizzo...

p.p.s. se ti serve una pompa da 3.000 litri hai montato male il filtro.