Pure clay, non-absorbant, kitty litter is actually that... Pure clay (that is unscented, no antibacterial and no additives), non-absorbant (that is not clumping) kitty litter.
Laterite does not even have to be in the center. Simply mixing it into the kitty litter will make it work quite fine. As stated on a post on his blog, paraphrasing several paragraphs in
thank you for devoting so many years, "
Actually the Laterite can be mixed in the cat litter or placed in the center of the BCB’ ...
My testing has shown that it doesn’t make any difference if the BCB’ are squire, rectangular, pentagon or circular.. The size of the BCB’ are only restricted to their weight and what one can lift easily ... Laterite is not restricted to only the core of the baskets but can be mixed up in the center of the baskets or homogeneous placed in the BCB. Using physics this means the BCB’ although having different constituents throughout will still have the same electromagnetic interaction with ions and will be uniform without irregularities no matter where the Laterite is placed."
Apparently, Novak has become incredibly relaxed on how it was said to be done in the first PDFs that were first published sometime ago and compared to how it is now. There are also posts stating the ratio of Laterite does not matter as long as there is a "noticeable" amount and what the owner can afford.
Also, the reaction time appears to be dependent on many environmental variables as expressed in the various testimonials ranging from days to weeks to 3 months to 7 months, depending on which testimonial that is read (which is to be expected with testimonials).
To not do things "correctly", this would simply be not including Laterite, a basket without holes, and restricting flow around the baskets.
However, in an effort of me being a sarcastic comedic jerk, once it is established, then the pond will "never ever, ever, ever, ever, ever" have problems with any inorganic chemical (i.e., ammonia, nitrite, nitrate) and "never ever, ever, ever, ever, ever" have problems with "in the pond" algae blooms including other fish health problems that will "never ever, ever, ever, ever, ever" be encountered that is commonly seen "that is absolutely due to terrible conventional filters".
You really need to look into the science, outside of Novak's words, of why Laterite and other clay is used in filtration, that is in even industrial filtration in particular contexts... Then you will realize that this is nothing new... Sorry if this offends...