Following inspiration from this question, I've set myself up with equipment to brew one gallon batches. The idea is to brew small batches to get a solid recipe down, then scale up to a larger batch.
Now, a 5 gallon recipe calls for 1 tsp of Irish moss (according to package directions). If I scale linearly to my one gallon batch, that's 0.20 tsp of Irish moss. I don't think I can be that precise with my measurements. If I err and use too much (0.25 tsp, for example, 25% more than what is called for!) what will be the side effects? Will my beer be "too mossy"?