acidic after 24hrs

[Spiff]

hi guys,

my cousin has this prob which i really dun know wat to do.

here it is: when she tests her tap water the ph is ok, but then when she wakes up the next day the fishes r all lifeless, ph olso turn acidic.

after changing 80% of the water the ph goes back to normal,n the fish r ok again. but the same thing happens again the next day.

wats up? need ur help. not much experience wif fresh water fish

[vinz]

Err... freshwater, yes?

Anyway, Spiff, more details please. What substrate is she using? Any rocks, drift wood, plants, etc? Adding anything to the water? CO2? What is she using in her filter? What pH values is she getting?

[David]

hi spiff......just to add on, it may be good to check her tap water KH level which I believe can be pretty low. My tap water KH is at 2 and if voided or very low dissolved CO2, the PH is at 7...but once I inject CO2 without adjusting the KH up, the PH goes all the way down to about 5.5.

Incidentally is your cousin injecting CO2 into the tank or is there any peat moss thingy in the filter? Usually these are the two main substance that can drop your PH that fast and that is provided if the KH level is below 3

[ryan]

hehe then its ph crash lah...

[Spiff]

ok guys
thanks...will check wif her. not very close so dun really know much.

[DEA]

the way you describe it i presume she's injecting the co2 overnight
check back with her, willya?