Problems with Milwaukee Reg

Hi guys i need some help let me explain what has happened,

Ok i just bought a milwaukee reg brand new, i followed the instructions, so here goes,
1) I took the reg conected it to my co2 bottle.
2) Turned off the bottle the reg was also unplugged.
3) I turned the needle valve all the way counter clockwise as per instruction.
4) I turned the main know all the way out counter clockwise as per instruction.
5) I plugged it into a wall socket and started to turn up the co2 slowly as per instruction.
6) I then plugged it into my timer.


It worked well for a week then i noticed one day i came home and found the bubble count very high, i lowerd it again using the main knob. Then another day found the bubble count to low, never did i touch the small right valve cause i know that could cause back pressure.

So this morning i woke up to find the co2 indactor yellow too much co2 right, fish dead. I looked down at the gauges and the left gauge was at the zero mark and so was the right gauge which is normal for that. Also all the water in the bubble counter was gone. I turned on the reg and notice yet again bubble count very high, and as i adjusted the main knob the right side gauge was going up which it is not suppose to, and the left gauge wwas still at zero.

Now let me mention this is the 5 reg ive gone through i have no idea what im doing wrong or what is wrong. Also the co2 goes straight into a pvc diffuser.

Help PLEASEEE!