If it's working then it's great for you![]()
If you start to add CO2 (or liquid carbon) you'll proabably be wanting something with Nitrate and Phosphate in it.
On the flip side I'd say it's a pretty expensive liquid trace mix though really. There are certainly cheaper alternatives out there.
James' Planted Tank is a great place to start if you fancy making your own All-in-One's.
Tropica do a good Complete mix (TPN+) and one similar to yours (TPN) but they are still pricey.TNC Complete and TNC Lite are cheaper versions.
500ml is nearly £15 from Zooplus?and cheap![]()