I use so many of these things because I have so many gallons in my tank and need to constantly change some water at least every few weeks. This is the cheapest vendor per ounce I've found and it comes right to my door.
ACCU-CLEAR Water Clarifier for Freshwater Aquariums - Quickly Clears Cloudy Water, Ideal for Weekly Use
9 Review
Omega-3 caps, 1000 mg, 100 pcs, 1 pack, neutral
34 Review
π API Stress Coat Water Conditioner | Tap Water Safe, Repairs Fish's Protective Coat, Use for Water Changes, Adding Fish, and Injuries
9 Review
Tetra AquaSafe tap water treatment agent, 5 l
11 Review