Yes, I think so. It's a reaction with UV light and hops or some such. Hopefully someone with science will chime in. As for the off flavor, try this experiment. Pour a hoppy beer in a clear mug and set it in direct sunlight. Now pour another and drink it. After drinking go back and sample the...
+1 on brewersfriend. it's pretty handy for checking facts and comparing styles.
Your recipe looks a lot like what I brew for my house ale. I prefer a Pilsen DME because the darker extracts seem to compete with the grains for flavor.
Well Done!
I can appreciate the satisfaction you get from building a tool (in this case a spreadsheet), to help make a job easier.
Over the past couple of weeks, I built my own spreadsheet to help with my brews because I can't find downloads that do what I want. I also use How to Brew as a...
I'm afraid I don't have first-hand knowledge of your particular situation. I do extracts, bottles and didn't get a fridge until after about 90 batches.
However, somewhere, I read that temp control is most important during primary fermentation. After that, temps are less important. Of course...
I experimented once by adding 1/2teaspoon of cinnamon to a 5 gallon batch. The cinnamon flavor was so strong that it ruined the beer. We drank it but didn't enjoy it at all.
I put at least a half pound of corn sugar in everything. I prefer a high alcohol beer so it works for me.
You plan on making double batches? Try one with extra corn sugar and one with extra DME. Taste them side by side. I don't think they will be radically different. The comparison will help...
Welcome!
There is no bad way to get started, here's what I did though;
Read a book. Joy of Homebrewing or How to Brew (preferably both). These put a ton of information at my fingertips.
Brew a simple extract kit with a short brew-to-drink time. Gave me confidence that I could make drinkable...
I can't help in your quest for the ultimate bottle brush, sorry.
However, for cleaning bottles an overnight soak in Oxyclean and a rinse with a jet style bottle washer reduces the need for a magic bottle brush.