I have a 10 gallon split in 2 with a juvenile on both sides. i make sure i do frequent water changes and clean out any poop and left over food as soon as i notice it. i am taking my water to test it tomorrow but is there anything i can do that will make the water look cleaner? ( i plan to upgrade once my axies are a little bit bigger, they are on sand and the filter is a sponge filter) any input will be helpful!