How can I clear up cloudy pool water without flocculant or draining?

Balance your water chemistry first — test and adjust pH, chlorine, and calcium hardness, then shock if needed. Run your filter 24/7 and clean it when pressure rises 8-10 psi above normal. Brush the walls and floor, then vacuum to waste if possible. Use a pool clarifier instead of flocculant to avoid a mess that sinks to the bottom.