If you are doing a fishless cycle I don't see the need to test everyday. I probably would just to get an idea of what is going on. If you have a fish or inverts in there I would definetly test daily. Just incase you need to do an emergency water change.
38 gal SW
, 40lbs base rock, 5lbs live, emporer 280, bio-wheel 330,tronic heater, 2 O. clowns, 1 firefish.
29 gal FW
, boring...soon to be salt I think.
10 gal SW
, 20lbs LS
, 20lbs base rock, 1 unhappy domino damsel (he was in the 38...switched the percs and the damesel recently).