Why won't our newts go in their water?

[Hester]

We changed our marble newts tank to 1/3 aquatic 2 weeks ago, but to our knowledge none of them have entered the water.
We have a good filter and the water quality looks good...

...any ideas on why they're not keen on swimming?

[Julia]

Would you be able to provide a photo of your set up ? How old are they too?
I have recently transferred my 3 to a more aquatic set up.They are just over a year old (from hatching). This is currently a large crate, with a land area consisting of 2 bricks, a dish of soil, stones and cork bark and a plant. The water area has a few stones and lots of water plants. I do not use a filter. Of the 3 , I have one male that spends most of the day in water. I feed them alternate days chopped earthworm in a small dish on the soil area. All feed here. In the morning I tend to find them all on the land area.

[Jennewt]

This is dealt with in detail in the FAQs
Caudata Culture - Frequently Asked Questions