the salifert kit is worthless for testing phosphate, it's just not accurate at the low end. the deltec/merck is apparently the only 'regular' kit that actually works at the low range like we need.
I have the hanna, but someone borrowed it recently and I haven't gotten it back yet. I'll try to bring it to the meeting if I have it back by then, or I can leave it at UA for you to pick up sometime. I think it's best to loan it out rather than have people bring samples, since plastic containers will usually probably leech some phosphates.
Honestly, the 'how long for glass to dust' test is probably better than actually testing tank water though. I see the hanna more for testing source water and stuff like that since the insides of a tank are way to dynamic to really know what's coming and going on with phosphate regardless of the reading. Going a couple days between dustings seems fine to me, my tank always does best when there's some algae growth. it's bad when it dusts over within a few hours...
