First water test results


Well-known member
Apr 25, 2008
San Carlos Mexico
I tested the water for the first time today and it revealed the following numbers

FC 1.5
CC .5
TC 2
ph 7.3
TA 150
CH 800
CYA 120
temp is 72

With what little I know this is telling me to do a water change. Should I do 2 draw downs of say 25% to 30% each or would a 50% be better to start? The Ch out of the tap is 150.

Thanks this is a great forum


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
You want to leave at least 1 foot of water in the shallow area. Other than that two partial drains will require slightly more new water than a single deeper drain but otherwise will work just fine.