I have a planted tank with carib tahitian black sand. I am curious what combination of ferts would be best. I am currently dosing Seachem Excel everyday/every other day, i have a root tab for substrate feeders.
Would you recommend using any of the other Seachem ferts?
depends on the complexity of your set up. if you have a low light tank, the photosynthetic process is not going at high speed and so the rate of nutrient uptake will be much lower. for high tech, fertilizers are essential--in most cases, you will need every single offer from the seachem line except for nitrogen.
i use Fe, P, and K daily, and add in the trace elements every other day.
that's going to be a hard balancing act to achieve, depending on the plants you wish to grow. certain plants are slow growers and so minimum pruning happens, even under optimal conditions, such as anubias petite. general rule of thumb, most stemmed plants have fast growth rates. slower plants will include: anubias sp. and java fern, maybe Alternanthera reineckii 'mini'. if money is no problem, bucephalandras make great plants as well as cryptocorynes.
P, K, Fe should be done routinely. trace elements such as Mg, B, and Ca can be added once a week.
My 29 is pretty heavily planted, I dont dose excel because i have co2 but seachem ferts are wonderful and I find more comprehensive than most api versions. But only by a little. If anything I would calculate out what each plant likes and switch to dry ferts because it is more efficient usually.
As far as dosing or not? If you have co2 and High light (or even medium light) you want to dose ferts. Without ferts and weekly water changes, and especially in a nano you will end up with lots of dust algae, and lots of browning, holes or yellowing plants. The co2 makes the plants gobble up resources a lot faster.