I don't know of any Front Range Colorado water that would be considered soft. The best you could do is not be liquid rock, so I wouldn't worry about that at this time.
More so than dirtied gravel, see if you can swipe a bit of filter media. If he doesn't have "that kind" of filter media, give the filter media a good squeeze into the bag you are transporiting the gravel in. The highest concentration of good baceteria is in the filter media because the filter is seeing the best flow of water.
Denver Fish Den is where you want to go locally for advice. More so than the big boxes. I know of one big box in the metro area that has a good fish dept, and that is because the general manager is a "fish guy".
Depending on your location, the Colorado Aquarium Society is also a good local place for advice. They do have a forum, but its pretty sparse on content. Their meetings, I hear, are usually pretty well attended though. They are also having their spring auction this weekend.
Keep at it, keep us posted.
More so than dirtied gravel, see if you can swipe a bit of filter media. If he doesn't have "that kind" of filter media, give the filter media a good squeeze into the bag you are transporiting the gravel in. The highest concentration of good baceteria is in the filter media because the filter is seeing the best flow of water.
Denver Fish Den is where you want to go locally for advice. More so than the big boxes. I know of one big box in the metro area that has a good fish dept, and that is because the general manager is a "fish guy".
Depending on your location, the Colorado Aquarium Society is also a good local place for advice. They do have a forum, but its pretty sparse on content. Their meetings, I hear, are usually pretty well attended though. They are also having their spring auction this weekend.
Keep at it, keep us posted.