po4 and zeo

[Proteus]

Ok. I did 15 gallon water change and will messure po4 in a few hours and check again in 24 hours. I removed my filter sock as it may be residue fronm washing machine.

I wasn't able to get new test kit today as I worked late

What bothers me the most is I used prodibio from day one and all was well I didn't think the change over would be so harsh