It looks great, Jolanda Its a big tank for so small fish 🙂 ..
If they can hide, they will 🙂 … but good that you see them every now and then.
The plants you have in the tank requires quite a lot of light, – and that is probably not so much ‘natural’ for the linkeis, – they like it a bit more subdued.
My paro tanks has more or less no plants – except for some javamoss, – many of them are really just leaves for decoration – and javamoss.
And then I use a lot of plant for surface-cover. Duck weed 🙂 or salvinia natans are very good for that.