People freak over 30-40 ppms nitrate for a reason, it inhibits growth and promotes illness in any concentration. I have an almost OCD like habit of keeping my water below 10-20 ppms nitrate and even then I'm still doing a water change within the time the seachem prime has made it less harmful.
I've found 20-30% every 2-3 days respectively and then one large 50% or more change once every week or so plus pothos keeps my water under 10-20 as readable on the api liquid test kit
Sent from my XT1080 using MonsterAquariaNetwork App
Your post proves you lack any real education about water chemistry and fish tolerance.
do as you will, "your tank, your fish"