Yes. It is nessesary to have a filter to keep the water moving and oxygenated. It is also helpful because the water's movement mimics the movement of water in the axolotl's natural habitat. Just make sure that the water does not move too quickly because it could be harmful. If the axolotl is not moved around by the filter and you can not see a current in the water (except above the filter and in its immediate area) then the filter is on too high. Be sure to change the filter regularly as much as needed. Every axolotl is different and thus the filter will become dirty at different times.
If axolotls breathes oxygen, then yes.
If you are getting water in the fuel filter, it is coming from your fuel tank. You will need to remove and clean the tank.
I have never kept them but at least a 30ltr tank is advised by experienced growers for one Axolotl and an extra 10 ltrs needs to be added for each extra Axolotl.an axolotl tank should be at least 10 gallons.
Yes but you need to buy a saltwater filter to replace the freshwater one.
No you do not need it because crawfish are not good swimers and can die if you have that much water.
Yes you do need a filter in your fish tank ifyou don't the tank will build up dirt and the fish will die. Also when you get a fish tank you need to clean it out then fill it with water then put the filter in and wait 24 hours. This helps to ensure that the tank is somewhat stable before adding fish.
It never hurts to have a filter it will only improve your fish's chances of survival and decrease your need to clean.
Yes ! The filter will help to keep the tank clean by removing uneaten food particles, and faeces from the water - reducing the amount of bacteria.
Different species need different conditions and water currents. I would get a filter that will turn over the capacity of the tank at least once every hour.
There is no filter in a hot water tank. It is very easy and cheap to fit one either side of it.
Normally you don't really need to clean the filter unless the flow is too low. If this is the case, you will want to rinse any filter media in a clean bucket of old tank water. Do not rinse filter media in tap water as this will kill off all your good bacteria for your tank.
It never hurts to have a filter it will only improve your fish's chances of survival and decrease your need to clean.