text: The top layer of the aquarium substrate needs to be 2 inches. This one should act as the anchoring support for plants and prevent the nutrients washout.
  Do not pour the whole bag substrate you purchased in the tank. Here are the instructions to follow and calculate the amount of aquarium substrate you need in the neon tetra tank.
  Now calculate the amount of the soil need by using the formula: Length x width x layer divided by 1000.
  While you use aquarium soil, the thickness of the substrate layer needs to be 3 inches without the presence of any other layer.
  You can’t leave the aquarium substrate on its own and think it will clean itself. It won’t, so you have to do it yourself.
  The process is quite simple all you have to do is vacuum and remove the dirt out. You have to surface vacuuming of the light substrate every week while performing the water change.
  If you have embedded old roots in the tank that are there for few years, it is high time to remove them. But be careful with the roots, only the roots of dead plants that are no longer in the tetra tank should be removed.
  This can be quite a work and there is no shortcut technique to do it. The work is the same as vacuuming the light substrate but this time some deep cleansing.
  Use a small spade or your fingers to uproot the old roots and move the Aquasoil. This needs to be done whilst you siphon up detritus and small particles.
  Once you use aqua soil in the tetra tank, I recommend you to perform 25 to 50% water change twice a week for the first 4 weeks.
  Here is an article to help you clean the tetra tank properly How to Clean a Tetra Fish Tank? [Step-by-Step]
  You might be wondering a few more questions about neon tetras. I might not be able to read your mind or answers all the questions you have in this segment. But here are answers to a few FAQs you might like answers to as well.
  There are few things that neon tetra asks for in the tank. From temperature to pH along with the lighting neon tetras need everything with a certain range even though they are hardy fish.
  The ideal temperature and pH for neon tetras need in the tank ranges from 70°F to 81°F and 6 to 7 respectively. Whilst the hardness of the water should be on the soft side with less than 10 dGH.
  Now coming to the lighting for the neon tetra tank, these fish need moderate to low lighting. You can go for the fluorescent light with lower watts.
  No, neon tetras cannot live in tap water. There are many reasons for not using tap water for neon tetra tanks but the major one is the presence of chlorine.
  Most of the public water facilities use chlorine to decontaminate the water and hence the essence remains.
  Likewise, this chlorine present in the tap water is highly toxic for both neon tetras and beneficial bacteria present in the tank.
  Since neon tetras prefer a heavily-planted tank, the oxygen demand is quite easily met with these aquatic plants.
  But some aquarists like the aesthetic look bubbles bring to the tank, so it is never wrong to have one if you prefer them too.