Re: tubing how fast is to fast?
Safe speed is a relative term, I prefer to use the term safe mouth, IE if you want me to be nice pulling you on my tube behind my boat it would be advisable to not make fun of the now visible portion of my head due to my disappearing hair.
This is most common with teenagers but can become common with Adults who have had a little too much liquid courage or have trouble controlling their ego.
Now that we have cleared that up, I prefer to keep tubers around 18-25 MPH but lets be honest, conditions on the water and skill of the rider play a big part on the speed in which you tow! Young children sometimes don't require the boat to be on plane, meanwhile a skilled teenage rider may require you to test your driving skill to get the most bang for your buck, but when you combine a skilled rider in rough water you really don't need to go 25 MPH to get them airborne! Now the caveat to this is when you and your boating friends get involved and ego gets in the way next thing you know your doing 50 MPH and whipping your long time boating buddie because he tossed you 50' behind his boat 30 minutes ago...
Its a never ending issue, BUT remember this, the harder you are on your wife and children towing them on a tube will only come back to haunt you ten fold at a later date and time! Better to pick your situations wisely! For instance, take your childrens friends with you, competitiveness between them will offer you the ability to blast them and then simply dish it off by saying "Your buddy told me to do it!"
DISCLAIMER....telling your wife "Your buddy told me to do it!" DOES NOT WORK!!
Look just be safe, learn what it takes for you to get the best results from your boat, and BE SAFE!!