Koi tank advice

[bubblepuffer]

I think over 100g will not enough one day.. .. I got 2 18" Koi.. Migrate fish from tank to a huge water tub that around 6' x 6' x 4' in the furnace room.

[exee]

Thanks for the advice everyone!

You all are saying about the same as what I was thinking too. I know the tank is not large enough for these fish. So I will recommend he get a 100+ gallons tank.

In the mean time I will help with doing water changes and check the filter media.

Thank you!

[bubblepuffer]

make sure you do the water change slowly as the Koi currently used to the dirty water... so a quick change from dirty to clean water migth causing problem