I am not familiar with Tom Barr's non-CO2 dosing method so I cannot comment on it.
Seachem Equilibrium may be difficult to find in Macedonia. If you can't locate it you could use Tom Barr's GH Booster which consists of:
25% Gypsum (CaSO4)
25% Epsom Salts (MGSO4)
Dose as necessary to maintain about a 5.0 dGH hardness.
Hope this helps!