How do u protect your turtles from birds and other creatures ?

I don't. They're big enough that birds aren't a problem, and other animals can't really get to them as they bask on an island in the middle of the pond.

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2.3.0 Southern Painted Turtles
1.0.0 Florida Red Belly
2.1.1 Common Musks
1.0.0 Classic Cornsnake
0.0.2 GALS + infinite babies
0.1.0 Tibetan Spaniel
1.2.0 Brahma Chickens

Do u need to have any sort of filteration in the pond or just plants ?

Wow thats awesome are they your turtles or are they wild ones?

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2.2.1 Bearded Dragons (Shrek & Fiona)
(Dougie & Daizee) And (Tony)
0.0.2 Hermann Tortoises (Tommy & Tinkabell)
0.0.1 Corn Snake (Pop Corn)
0.0.2 Goldfish (Kevin & Perry)
1.0.0 Golden Retriever (Sam)
0.2.0 Chickens (Peggy & Jackie)
1.0.0 Rabbit (Charlie)
0.0.2 Yellow Bellied Sliders (Micheal Angelo & Rafeal)
0.2.0 Ferrets (1 lizards rule)

Wanted Farm Animals Pm Me

They're mine, the pond is in my garden. These species probably wouldn't survive long in the wild in the UK as they come from too far south.

There's a submerged pump with a foam pre-filter, it pumps water into a 5 gallon filter filled with Alfagrog, then a 40 gallon reedbed filter, then back into the pond.

__________________
2.3.0 Southern Painted Turtles
1.0.0 Florida Red Belly
2.1.1 Common Musks
1.0.0 Classic Cornsnake
0.0.2 GALS + infinite babies
0.1.0 Tibetan Spaniel
1.2.0 Brahma Chickens