Well gf,
I'm using a 'Realux' T5 unit, from Aqua Essentials. It's the complete unit version, with the reflector and starter all incorporated together. I did worry a little about being unable to change the tube, but with it lasting 7000 hrs, it will outlast this tanks expected lifetime with me. I will only be keeping this one for a year or so.
I have used a lot of goodies in the substrate, and I hope that there is enough. Working with what all the manufacturers said about amounts of product, and the substrate as it was, being a 60/40 mix of 2-4mm pea gravel to aquaclay already, I used as follows.
Aquabasis Plus 5 litres x1
JBL Florapol 600gm x1
API Laterite 1.56Kg X1
JBL Tormec peat granular 1 litre x1
AquaEl 25w Heater cable x1(obviously

)
I must admit, I was a little worried about how little Laterite API said was necessary. I gutted the tank, and layed in the cable, being careful not to kink it too much. I then poured the Tormec onto the tank bottom, and spread it out. It only really filled up the gaps inbetween the cable, so onto that went the Aquabasis. I then rinsed out the Laterite, sprinkled that around (my oh my, it looked just
sooooo pitiful) and then added the Florapol in the areas I will be planting Crypts. I then put the existing back over the top, giving it about 40mm over the new stuff at the front, and 60mm at the back.
I have read that the addition of a heater cable makes the plants root faster, and feed better. The water onion that I took out of the left mid of the tank had roots TWO FEET long!. Maybe it'll climb out of the tank and do a dance now......

Anyway, now I'm just waiting for the new year, and I'll be dropping Andy at Greenline a big list, cos it looks sparse now I've lobbed all the dead looking plants out.
Yes, I know the background glass is still spattered with aquabasis, but that will give me a little something to do when I'm hungover tomorrow.
It's three hours since I 'finished', and the water is beginning to take on that 'glassy' look again. I think I'm going to order another light unit from Aqua Essentials. Just to take me up to 2.something WPG. Still got a lot to learn, and a long way to go.
Thanks for all your help guys, this forum is a darth of info.
Happy new year to you all, hope you all have a good one tonight

sub.
PS, going to borrow my Sisters camera next time, I've dropped this one and its gone silly.