Ive never used this hydroline but 30lbs sounds crazy, if he is using a spinning reel he wont be able to get much line on there. I run raven 10 lb mainline on my pin because its cheap so I can respool a few times a month if I want to and it doesn't cost much at all. The raven line is underrated so I can use 10lb flurocarbon leader and not have to worry about breaking off above my float. If you want to stop losing floats all you need to do is have a stronger mainline than your leader, it sounds like you haven't been using a leader at all so if you make that change you should see an improvement.
If you are using a spinning reel check the line capacity before spooling up. You want to be able to get at least 80-100 yards on there if you ever fish big rivers. You may end up having to go down to 8lb but if you can throw some 10lb on there and use 6-8lb flurocarbon leaders.