Prefilter with filter sock (very important, especially when stocking for long periods of time) or mat then carbon would be good enough for NSW, Paul. Christian's NSW stocking suggestion is good, sure ka na hindi maiinfect ang isda mo kapag matagal nastock ang NSW. You may want to canvass for other sources of the container mentioned by trggerman, may mas mura pa sa 4k minsan. Baka makadaan ka along Marcos Highway bago mag Sta. Lucia, maraming dealers dun.
Si Dexter (dorado) NSW+DIY salt dati. Nakastock lang sa 8 50-gallon drums yung NSW okay naman. Basta aerate mo muna bago gamitin para parehas ng pH.
Beer and softdrinks daw next get together. Hope our hobby seniors can join as well.