For fertilizer, I would use Flourish Excel.
That's what i did, i used 5kg on a 50 gallon tank ,i just used the whole tubful.Thanks, this is the list (soon to be) of the things i think i will need:
2x Arcadia tropical 15 watt tubes. (Have)
1x TetraPlant Complete Substrate 2.8kg.
1x Some form of fertilizer, havent decided yet.(Suggestions?)
Anything else i should add to the list?
Should i just add 2cm of the tetra plant substrate and then cover it with gravel?
Ive decided to combine the Tropical and Freshwater bulbs, will this be enough to have a fully planted thriving aquarium? (Low-Mid light plants)
i am cycling my first tank at present - last week i took adivce from experienced fishkeepers and trwlwed this site for advice and finally did as follows
3cm of tetraplant complete substrate substrate - on top i put 8cm of 1/8th size pea gravel (very small and round gravel)
the plants are looking good and i have been assured that they will soon root down to the tetra and have all the nutients they need for some time to come. hope this helps.