I think it will depend a lot on your objective and what you want to answer by measuring TSS in water. You need to think what i want to get with such informaton and then think if large plastics from candies can be considered TSS or not. As the name says, TSS is something that is solid and suspended and then we will measure the weight of that by passing a known volume of water through a filter, and in this concept there is no limitations on size etc. But when we usually think about it, we consider smaller particles that are either easily settled down or remain suspended because initial preliminary treatment take away these larger particles. But in my opinion as i mentioned before be sure what is your main question and check if it makes sense or not to consider this. Because by definition there is no problem at all to consider the weight of large candy wrappers.

It greatly depends upon the objectives of your research. Otherwise tss are minute particles that remained suspended in water so by definition plastics wrappers are not tss

I agree with Amin Shavandi, in TSS generally suspended particles are considered and wrappers should not be considered in calculating suspended material.

Dear Florentino

The total suspended solids (TSS) are solid materials, including organic and inorganic, that are suspended in the water. These would include silt, plankton and industrial wastes.

Size of materials to be considered as TSS is also a factor. So, garbage like candy wrappers normally doesn't come under TSS.

My suggestion is you measure both - TSS including garbage and excluding garbage.

Best wishes