Originally Posted by
Jandiscus
Peter,
my advice would be to do a 100% water change just before the fish arrive and then control the water quality by performing large daily water changes until the parameters stabilize at NH3 0, NO2 0, NO3 <20ppm. Supplement with Seachem Safe or Prime to neutralize any remaining build ups during that time. I'm sure others will have more and better ideas. Be mindful of the amount of food you are feeding and siphon off any left-overs and waste.
Good luck! I've been in your shoes and this worked well for me.
JC