1. DO: change the water in the aquarium IS GOOD, AND 'MUST, MUST BE DONE. :-)
  2. How often and how much we choose it depending on several factors, first of all the organic load and the relationship with the quantity of plants. Mediamenti is advisable to change from 15% to 30% every 7-15 days.
    Personally I'm pretty lazy and return on average 30% every 3-4 weeks.
  3. DO NOT: Use water than the usual, the water exchange MUST be at a temperature as close as possible to that of ' aquarium and the same goes for the chemical values.
    Clearly if you change the 5% minimum overhang will be ... but if you change 30% water MUCH more acidic or basic, then the PH it may suffer greatly, so the temperature.
  4. DO: Use a water conditioner when you use a lot of tap water. Personally I use only 10-20%, so unless they do now for years and years ... but not everyone uses purified water.
  5. DO: Remember to be made ​​at least an extra water change when you have used a medicine in the aquarium, made ​​"heavy restyling" of plants, driftwood or rocks in the aquarium (inevitably raising the dirt from the bottom), so something sovradosato accindentale (happens to me occasionally with a few bottles that do not have nozzles or dispensers, so unscrewed the cap and tilted the contents down all together!)