Fish at bottom of tank after water change Help Plz

One a week every wednesday I do a 10% water change, but after yesterday's water change this morning my fish are all lying on the bottom. And I do treat my new water a day before.

 

must say 10% once a week isnt enough?

 

O, so what would be the best number to change?

 

atleast 20-30% once a week what fish is in the tank and size tank

 

It's my 20L tank, with two goldies, I know it's to small for two goldies but I am looking at getting a bigger home for them

 

i think its their bio load thats quite big try and do 2 wc evey week thats 20%

 

What hardware are you using in the tank?

 

@Ryno: Thanks will try it like that from now on

@SloMo.00.: I am using a Boyu FP-108 filter and one airstone

 

Ok, I agree with @Ryno. Do bigger water change or two times a week 20% with treated water.

 

@SloMo.00. : Will try it for two weeks and see what happens. Thanks for the advice.

 

keep us posted

 

Will do so, will it be fine if i do another water change tonight and then from next week twice a week.

 

thry another 10% or 20% would also be fine

 

Yes I also agree rather do 2 x 20-25 % wc weekly always try and give the best water quality for you fishes.

 

@hviviers75 : Thanks for the advice

 

Only a pleasure antifreez we all are here to help out where we can:woot::woot:

 

And how do the goldies look this evening @Antifreez?

 

I heard that goldfish poo creates alot of amonia, wonder if its true

 

@tracyp: Did a water change last night about 20%, they showed signs of life but not much yet.. Holding thumbs they get better. Not going to touch there tank for a phew days and see what happens.

 

Switching to SERA Aquatan water conditioner tonight..Are SERA products good? Also they advised me to put some salt in my tank, as they said it will help breakdown the bad stuff. It's the same salt they use in Koi tanks