Cycle Question

I am about half way thru my new tank Cycle. This is my first Aquarium I have a 75 Gal Tank and 5 fish. My ammonia is now 0 my nitrite is .2. My question is about Alkalinity. When I test I am getting really high results 4.5 meg/L although my PH is around 8.1. Is this normal during the Cycle for my Alk to be so High as my PH is low?:-/

 

I wouldn't consider this to be a high alkalinity level. It is higher than NSW but this 4-5 meq/l range is prefered in the aquaria. Your PH will swing low to high depending on the time of day. Usually low with the lights off and higher with them on.

Jim

 

Thanks for the information.