How do I make my Buds tight and pretty?

Genetics and experience will do it. Nothing extra you put in the pot is gonna make that happen.

Better Genetics. Frankly, would not run autos if you’re looking for density and bag appeal

Hey Sators, That's an interesting idea/statement. Have you done a side by side to see if the plant watered with sparkling water grew better, would be an interesting experiment. I mean, roots need oxygen, not CO2, but the added co2 released from the sparkling water may provide a boost, and the added trace minerals in the sparkling water may help plant out. Now you have me thinking. Would need to do 2 clones treated same until end of flower cycle, water one with sparkling water and keep other normal. Have in same tent so if the sparkling water just releases co2 both plants would be affected. If only the one hit with sparkling water had benefit I would start doing more research and see what may have caused.. Interesting, great, now I have more damn experiments to play with.. I wonder if it would have any effect using sparkling in dwc... lol, k gonna stop thinking about it until I have room to play.

In late harvest watering with sparkling water. CO2 gives boost for buds.

I can say in my experience the biggest factor is genetics. My last grow I did nothing different, same nutes, same tent/light/conditions all that changed was genetics and the buds were like dang rocks, compared to last few strains I ran which were reasonably dense, but spongy compared to this most recent run. Aside from that, get your environment dialed in and make sure you are hitting them with AS MUCH LIGHT as they can take. Which means getting your nutrients dialed in so when they are maxing out their growth ability they are not starving/locking out. Also ensuring they are never thirsty or over watered. You can increase the CO2 to help. And finally proper drying (slowly) and curing can supposedly make them slightly more dense, makes sense, if you give the plant time to shrink and tighten up as it dries vs quickly sucking moisture out.. but I am not sure if that is accurate I would start with those, and dial them in as best as you can, I'm sure there are some products that may slightly help, but I can tell you that with cheap ass General Hydroponics Maxi series, kool bloom, molasses, and cal mag I have had some pretty decent results, and my last run had nugs that were dense AF.

Bullshit ! use a good light and pick a cultivar with dense nugs .don't waste money on nutrients. All I use is 20 -10 -20 start to finish

Yes, there are nutrients and supplements that can help increase the density and overall appearance of your buds. One of the most popular products used for this purpose is potassium sulfate. Nutrients ratios are listed as N-P-K. Those made for early stages have 1:1:1 ratio because the plant needs nitrate but most soils are already packed with nitrogen (at least for the first few weeks), when it comes to flowering the ratios are more like 1:3:2 or even 0:3:3 for the latest stages. When it comes to choosing a specific nutrient, I suggest you take a look here through the diaries, and choose a bloom nutrient that you would like. Happy growing! 👊