Getting microplastic out of the water is important.

But in the long run that's not the solution. Microplastic is not just in the water, but everywhere, like in the soil. Textiles not only shed plastic when you wash them, but even more when you wear them. Solution: don't buy. Use natural fibres.

Same with plastic utensils, cups, plates, containers etc.: don't use! There have been alternatives for (almost) as long as humans exist. From wood to metal to ceramics to glass.