Thanks guys, have got plants on order, listed below:
Hemianthus callitrichoides 'Cuba',
Vesicularia ferriei 'Weeping',
Marsilea crenata,
Eleocharis Aacicularis,
Hydrocotyle tripartita,
Pogostemon erectus,
Pogostemon Stellata,
I also took delivery of my online heater - never knew these existed before joining the forum, so it's already paying off! (Not literally, my bank is taking a hit)