When should my froglet have lost its tail

I moved in to a new house at the end of April this year.  The house has a pond in the garden, about 150 gallons capacity, maximum depth about 80cm.  The pond was constructed by the previous owner, with a butyl liner, and a small cascade from an upper pool, although the pump had been removed.  I have replaced the pump and restored the flow from the pool.  The pond is now supporting a reasonably healthy population of water snails, a couple of semi-aquatic plants left by the previous owner, and some duckweed.

When we moved in to the house my partner's sister donated a clump of frogspawn from their pond.  What with the upheaval of moving in we didn't pay much attention to what was going on in the pond.  We never saw any tadpoles hatch and we assumed that the frogspawn had all failed.

Last night when I was removing some fallen leaves and excess duckweed from the pond, I was delighted to find a froglet in my net.  It seemed quite happy, although I did notice that it still had quite a long tail (my first thought was that I'd caught a small fish!)

Of course I returned the froglet to the pond, but I was wondering: shouldn't it have lost its tail by now?  Can anyone suggest steps I could take to encourage it (and hopefully its siblings) to complete its development?

Thanks & Regards

Martin

Gemma

Thanks for that reassurance.  I'm pleased to report that a tail-less froglet was spotted in the border last weekend.  Let's hope there's more around somewhere nearby.

Best Regards

Martin