The simplest micro ferts to get would be the flourish comp. You may need macros as well.
Tap water often provides both micro and macronutrients, but in a well planted tank these nutrients are gone quickly. The fish provide nitrogen in the form of nitrates, but potassium and phosphorus can run out. It is said that flake food adds a substantial amount of phosphates but I don't have a test kit to confirm how much exactly.
If you plan to get into serious planting, using higher intensity lights etc, look into Estimative Index dosing routine, it will ensure that the plants always have enough available nutrients to utilize.
Plants do not starve out algae, if that were the case then your tank would be bottoming out on nutrients all the time, and the basic dosing routines ensure that there is always a steady supply of nutrients available.
Plants thrive when they have three things, light, ferts, and co2. Algae does as well, but seems to do much better than higher plants when there is an imbalance of one of those 3 key things.
All that said, a really low light setup like a single/dual t8 fixture is not going to do a whole lot growth-wise, so there won't be much of a demand for ferts either. I would keep any dosing plans very minimal until you upgrade.