frequency of perimeter checkings

[reeferious]

for all you primitive, back to basics, keep things simple folks out there, i'm wondering how often you check your tank perimeters. my tank is fairly well established and so i check basics like ph, alk, cal once every 3 weeks and if i see something out of wack i check for phosphate, nitrate, mag levels. those test kits are not cheap and so i try to stretch them out as much as possible. i'm not offended if you call me a cheap, cost saving reef addict.