Moroccan Oil doesn't condition hair, it doesn't contain any water based ingredients so cannot 'reset' the pH of the hair after shampooing, no fatty alcohols or cationic surfactants nor humectants. It will certainly make your hair feel nice because it's loaded with silicones and other unpronounceable chemicals, I suspect it contains barely any argan oil which is the only ingredient that does anything much for hair.
Which low poos were you trying? Many are loaded with unnecessary ingredients, you might get on better with a simple sulphate free shampoo 'base' (intended to have fragrances, oils or other ingredients added but you don't have to so nothing that can possibly build up) ideally with a pH around 4.5 to 5.5 which will encourage the cuticle to lie flat.
Sometimes build up is partly a function of damaged hair, ingredients overly adhering to a cuticle that is not in good shape. You should really wear a swimming cap anyway if you have any products in your hair, to stop those contaminating the pool.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics