can i have too many filter in a 3 gal

i got a filter with tank,I got a bubble machine and it was making a bad smell so i clean out my tank and put both the bubble machine and filter back in tank. Is this ok to do or is it too much.PLease anwser back quick

your bubble machine is ok,no problem..since your aquarium is about 3 gallon so that in my opinion you should do 40 % water change daily,so that you don't need any filtering system..

ok but i dont want to chage it daily so could i use both?? and how often should i chage the filter cartage??

okis,if you don't change the water daily keep the filter and do change the cartage in every 7 days..

thank u so much. i want the best care for my koi.now what about him swiming up an down in one spot is it normal?? its been doing it for about 5 mins now i am watching him.

that's not cause any problem,moreover it a good thing for you,it means that the koi fish know you very well,when you go near koi the koi see you and swims up and down so that you may give him food. .but don't give him food more than twice per day..

so it means he is happy and full.

yes!!!

A healthy aquarium depends on a balance between the biological load (food, fish, etc.)and its colony of beneficial bacteria. The bacteria live in the aquarium substrate, in the filter media, and on plants and decorations. If the bacteria colony is not large or strong enough, you have to use partial water changes to remove toxins like ammonia and nitrite. You may want to look at some of our blogs that discuss the nitrogen cycle and water parameters. The blogs are written for an average aquarist, so you don't need a chemistry degree to read them.

I a a little concerned that it is a KOI in a three gallon tank. How soon will a koi need to move to something larger, and what is the ideal tank size for a koi?

min 10 gallon...

that is bad thing to do if it is making a bad smell go to your nearest pet store and ask for advice