pH too low questions...

[Milad]

the tank I got from another reefer (kaliforina) and i set it up in early April and let it cycle for 3 weeks wtih the live rock in it. The liverock came from MikeOlsen which had the rock in his tank for a few years. He had shut down his tank so the rock was in SW with no lights for ~5months. as far the the cycle, i dont think it was a big cycle, the ammonia went up a bit on my test kit (second bar) but it didnt go up much higher than that.

I usually open the door when I get home after work so im sure im getting alot of air into this place. I also have 3 celing fans running (one directly above the tank) in 600sqft so there is alot of air movement.

what test kits should i be buying? These 5 drops here and 5 drops there test kits are really annoying and hard to read (im using API).

on a side note, i thought one of my PH probes was broken because it was not in water for a long time but turns out after sitting in my tank for a few days it fixed itself!