Tracy and I dove Cow this morning. On entry the basin was clear. Water level had risen from the 2nd step on 2/3/16 to above the 6th step this morning. Where the goldline starts it began to get a little tannic. At the bottom of the entrance restrictions it was darker tannic with vis about 2 feet. This continued for about 200 feet and then we swam out of the tannic into crystal clear water. There was no perceptible flow. Good vis and no flow continued down through Not My Fault and out to the Change-Up. It was tempting to take advantage of the low flow to go further, but a silt test indicated that it was beginning to siphon ever so slightly, and in anticipation of a low vis exit we turned 700 psi above thirds at 25 minutes. On exit the tannic water was another 50 feet into the cave and darker. We were OKing the line until it began to clear halfway up the series of entrance restrictions. The formerly clear basin was now noticeably tannic during our deco, and the water level had gone up 4 inches during our 63 minute dive.
Mike
