I did my water tests today and for the first time ever I got 0 for phosphate. I use the Hanna checker ul phosphorus tester and feel pretty confident in it. Of course I did not look at the results of the first test because the 2 mins had passed and the display had shut off. If I do not set the alarm on my phone I miss the results frequently. ADD at work. Any way, I asked myself, self, why did I get 0? Less feeding? Nope. Just changed gfo? Nope again. I had been praying to the poceleon goddess do to a nasty flu. Did not leave my upstairs for 24 hours so never even looked at my tank and I had not shut my UFO light off the day before so my tank went 3 days with the fuge light on 24/7. I usually shut it off for 8 hours a day. I also noted definatele chaeto growth since the last time I peered into my sump. I am going to have to do an experiment. 3 days of shutting my fuge off for 8 hours a day and then test. Then go 3 days of 24/7 lighting and then test and do this a couple times along with measured feedings. Need to order more test reagents first. Anyone else notice a similar correlation?