Mapito is a very airy medium with a limited water retention capacity. This will dry out faster and therefor the substrate must be watered more frequently. Most Mapito is not clean, ie they often have a higher EC and a somewhat lower pH. Always test this out before you get started by pouring some water on the mapito and squeeze it out 10 minutes later. Then measure the pH and EC of the water again. If you have done that, you can decide how to start the initial wetting (with or without the EC and PH).
You can usually use mapito 3 times, more often also but this depends on how you tread youw Mapito.