HELP! Removing chlorine from pond water

Help! My landscaper accidently knocked a hose off my pond pump and
emptied 3/4 of the water. When I arrived home my fish were in a foot
of water, alive & swimming but I had to add water back late, last
night immediatley, about 1,000 gallons. I didn't have any
dechlorinator. Today I saw them swimming, water very murky but
considering the cool weather they should be lower in depth. The frogs
were above as well. Should I still attempt to purchase a dechlorinator
in the morning or is it too late? Have to test ph tomorrw as well. I
live in Morristown, NJ, temp is about 55 degrees right now. Have about
50 comets and 2 small koi.