so after 4 weeks or so cycling (fish in) I now have had ammonia for couple weeks and finally got some nitrites over past 6 days. So ammonia was fluctuating from 0.25-1.0 and now has been steady around 0.25 to almost 0 most recent days.... (ph and nitrates normal, nitrates never go above 5) however the nitrites which started around 0.5-1.0 is now in the high 5.0 readings... I've been doing daily water changes (50%) every 24 hours and every time I retest it's back to 5.0+ (purple)..... should I be changing water 2x daily or ?? I've read that should not let go higher than 1.0 and when it does do water change... but I dunno. How many wc is too often ? Should I do twice daily because of high nitrites ?