Water Parameters= Test kit levels for...
Ammonia
Nitrite
Nitrate
Phosphate
and whatever else you can tell us, including number of fish, feeding amounts,
water change routine, etc.
You need to be able to tell us what is going on in the tank if we are going to be able to help you. Otherwise you are going to get guesses, and anecdotal opinions, instead of real help.
Hobby test kits are very useful for determining trends and ballpark water conditions, every beginner needs a basic kit. Even if they are "dip and read". These numbers help zero in on whats happening in your tank, and takes the guess work out of questions like " I have algae on the glass, what do I do"
Regards,
Jay