help!!!!

i have green star polyps that won't come out anymore and they lost their green color. my mushrooms and all of my other coral are doing really great. my alkalinity is really low. what should i do. could it be my tap water. my water company recently changed the filtration system.

 

Tap water???? Holy crap batman, you shouldn't be using tap water. Only RO/DI should be going in the tank. If the polyps are are turning brown it is probably due to low water flow as they like to get blowed around a lot.
If you only knew how much minerals you were putting in that water it would make you sick.

 

they aren't turning brown they are more like a white. and my ph is high.

 

You need to get RO/DI water in that tank ASAP with some water changes. I would start there first.
What are your other parameters at?? Mg, Ca, PO[SUB]4[/SUB], dHK....etc.

 

i have no idea what any of that is.

 

my tank was doing good for 3 or 4 years now and all of a sudden hell is breaking loose.

 

You kidding me... :-/

You have had this tank up for 3 or 4 years and not tested for any of this stuff. No wonder things are going wrong. Ca=Calcium, Mg=Magnesium, PO[SUB]4[/SUB]=Phosphate, dHK is another form of ALK reading. Better start doing some research before you crash the tank.

 

my tank is just crashing my ph is off and my alk is low and phosphate is not even on the chart its yellow. i don't have calcium. i don't have a calcium test kit. i was told not to put calcium in the tank. theres no saving this tank is there?

 

What are your parameters and you don't want phosphates. And you do need calcium.

 

Better do some water changes with RO/DI water to get some parameters to stabilize.