Hi Jenson,
May I know the size of your tank with how many fish?
Thanks!

The tank only 30L and currently overstocked with 6 fishes as seen in photos.

If it is the tank you have shown, I believe the fish will be under extreme stress.
Any fish in there with that strong current from your filtration and small area will have no way to rest fighting the current 24/7.:(

Oops thanks for pointing out.maybe I should reduce the flow rate to the minimum level

Your gfs surely be happier if you switch to my earlier suggestion of using air stone only. :)

+100. I can't imagine they live in a washing machine 24/7. :(

I get what you mean bro, but I did noticed they will rest at the front half of the tank coz the flow is mainly at the second half of the tank away from the side you all see in the photo. Hopefully by reducing the flow rate would make them happier.

Currently before the next upgrade not possible to use airpump and air stone. Invested in hydra and running together with the bundled filter. Though the guy did told us to remove the built in filter on top of the tank since using hydra 20 now. But I just a bit KS and leave it there :-p

Will plan for the tank setup for the next upgrade.

Haha well said. I laughed :-p

Bro,
Frankly, this tank is not suitable at all for GF and that filter takes up almost 1/4 of its space. Even lowering it will not help, but changing to a airstone will at least calm the water a little. I have a few new spare pump and lots of airstone. You can contact me at 86165526 to collect them. :)

Bro, this tank seems like for simple shrimp/tetra and planted setup. Not for goldfish at all! Really pity them....
Think it's better for the goldfish if you can just buy one of those big Toyogo plastic storage box and just use a simple sponge filter to keep them.