My oxygenating plants were delivered today and I am unsure if I need to bunch them or not. Can anyone advise?
I was expecting them to be bunched together with those little metal rings that weigh it down. What can I use as an alternative?

Cheers again you folks 
Posts
Hornwort (I've recently learned) floats freely in the water.
I recently bought some - which looks very inferior to yours - and just chucked it in the pond.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
Pete's correct - just throw it in the pond. It will sort itself out.
Oops, forgot to thank you both the other day. Apologies. Cheers, now chucked in the pond to do it's thing.
Pete8, I bought this online from Puddleplants. Couldn't source it locally, even as far up as Perth. I was told by the lady in Linden Garden Centre that getting their hands on stock this year had proved difficult. I'm sure yours will come away.
Thanks Angie fingers crossed - I can't even see it atm, I've got a pea-souper going on..
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.