Anyway, if you determine the compound (N,P,K, Fe, Mg) that's lowest in your water- it may well be potassium, then dose the amount you need to get to a good level of potassium for a few hours each day (it will go as/ if the plants use it) .

TNC Complete is a ready mixed fertiliser for the planted aquarium, containinga balanced blend of Nitrogen, Phosphorus and Potassium as well as Magnesium and all the important trace elements for a great growth. I have a plan in mind in regards to the light and adding ferts. Can I get your guys thoughts on it. I will be ferting TNC completeWe won't be beaten on the premium quality of our live algaecultures, and surely not on the price either! I’m pretty sure my CO₂ is okay, and I have repositioned my spray bar to give good distribution - the bubbles from the Twinstar M3 can now be seen sliding down the front glass. (Being able to visualise the water flow has been a major plus of having that device, and prompted me to improve my flow).

The dwarf hairgrass is doing very nicely, and I am gradually trimming that shorter and shorter because I want it to be very low in the foreground. Thank you-I didn't mention any values here because different amounts work well for different people. I would personally encourage you to aim for Dennis Wong's values: (in ppm) TNC Complete is an aquatic plant food specially formulated for use in all planted aquariums. For aquariums where the fish load is not meeting the requirements to supply the necessary Nitrate and Phosphate – TNC Complete is ideal for making up this shortfall.

The reason I want to switch over to DIY salts is cost, not really for this tank as it's not that expensive using TNC Complete for this tank but I'm about to set up a second tank and another larger third tank will be coming after that one, hence the interest in switching to DIY salts. All three tanks will be low light/low tech so the nutrient requirements should be pretty much the same per litre so I figured I'd get to grips with the dry salt mix now before I start the second tank.