Old tank water to new - algae?

I am setting up a new, larger tank to replace a fish only tank in which Ive had two perculas and a pseudochromis for years. The old tank has had an awful algae problem for quite a long time, maybe some combination of algaes...some bubble, some hair, mostly green, some reddish/purplish.

If I transfer some of the old tank water, do you think I will be transferring an algae problem?

Otherwise, I intend to use new equipment and also new substrate.

Thanks.

[melosu58]

What size is the old and new?

old is 16 gallon, new is 20 gallon

[melosu58]

That little bit of water I would use new water, esp if you are having algea problems. You could transfer algea spores to your new tank. If you had a bigger tank say a 75 gallon tank going to a 125 the I would say OK as long as you had a UV for killing algea spores. When you get the new water in the tank let it run for a few days before transfering over. JMO

Thanks !!