Now Foods Ultra Omega-3 is the bottle to buy when budget is the constraint. At $18 for 180 softgels (3 months at 2 softgels/day), it ships 750 mg EPA+DHA per cap (500 EPA / 250 DHA) — high enough that you can hit the 1-2 g/day general-health window at 2 caps and the lower band of the 2-4 g/day cardiovascular protocol at 3 caps. The trade-off vs IFOS-certified premium picks is real but not catastrophic: Now Foods uses lot-coded third-party testing at a GMP-certified facility rather than per-batch IFOS public reports, and the form is labelled 'concentrated softgels' (a TG-blend) rather than the pure rTG of Nordic Naturals (#1).
What you get in exchange is 35+ years of consistent household-brand QC at one-third the cost. Eight weeks running 2 caps/day with breakfast, here's the breakdown.