cloudy water !!! ???

I have a 65 gal tank with Ehiem Pro filter. The water was crystal
clear until I had to move the aquarium to a new house.

Each month I would replace the very top filter and charcoal pad. Each
week I vacuum the gravel and remove nearly one third the water and
replace. Everything was fine for 3-4 months - then came the move.
I drained the aquarium and left the pets with my local fish store to
keep for the day.

On the set-up I did not remove any of the filter canister water but
only refilled the aquarium with newly treated water. the kind I would
use on the weekly cleaning.

The water became cloudy almost instantly and has remained so for 2
weeks now? At first I though it was algae since the new location has
very good lighting but after treating to remove it did nothing.

I have two fairly large lionhead Orandas living together with two
Africa clawed aquatic frogs. They have been fine together for 3-4
months.

What could be done to clear the water without having to remove the
pets? Thanks!