Please answer the following water change survey.
Rohn
1. How big is your tank?
A Small (10-29)
B Medium (30-55)
C Large (>60)
2. How frequently do you do water changes?
A Bi weekly
B Weekly
C Fortnight
D Monthly
3. How much water do you change?
Specify in gallons
4. At what NO3 level would you do water changes?
A >=20ppm
B >=30ppm
C >=40ppm
D >=50ppm
5 And how much?
Specify in gallons
Rohn
1. How big is your tank?
A Small (10-29)
B Medium (30-55)
C Large (>60)
2. How frequently do you do water changes?
A Bi weekly
B Weekly
C Fortnight
D Monthly
3. How much water do you change?
Specify in gallons
4. At what NO3 level would you do water changes?
A >=20ppm
B >=30ppm
C >=40ppm
D >=50ppm
5 And how much?
Specify in gallons