min880107

Thank you everyone for sharing your thoughts feedback and inputs. Today i have confirmed the core issue. It was the water intake. From a cheap tooling, the water intake was all blocked from the factory. This is what i deserve for buying the cheapest stuff i guess. I put sponge filter frame on both of the box filter and now they work perfectly. Again, thanks to everyone who shared a comment. Thank you!

The three tanks are all separated. There is sand in the tank but it is black color so it does not show much. The idea of this filter is this

The air line tube runs through the middle of the pipe. It is an off the shelf part. I tried as you shared, adjusting the height of the air stone while adjusting the air pressure but the results were all the same. I think i have tried to do everything that i can adjust except for the water intake, which is built in the bottom mesh. It was just designed my self estimating that this size should fit my tank well. Thank you. I thought it was an airflow or pressure issue but i believe it was an issue with water intake hole being too small. Because it works now when we changed the tube with sponge filter frame. The picture with green pipe is a picture after it is fixed. Now i do have great flow. Its not 100percent but i think the off the shelf plenum which has water intake has a faulty design.

Yes, im going to put shrimps in the tank. Before putting them in, im trying to cycle the water with the new box filter.

Its a tank with box filter inside. What seems like a bubble, could be a messy silicone job i did 🙂

Thank you for your input. From reading your comment, it gave me an idea to try to run the box filter with no media at all. When i ran it with no medi, it was still acting the same. From checking some diy videos, i used one of old sponge filter and intergrated in to the box and now it is working fine. Still not sure of the what the core issue is but i think there was a limit on intake opening on the tube. Thank you for helping.

Here is a quick photo and a gif. Still cant figure out how to upload the video.. 😞

I wanted to upload a video but it only accepts gif jpeg jpe jpg and png. I would appreciate it if you can share how i can upload a video.

Hello I need some help, bad. I have 2 tanks that I wish to set up. The tank size is L 30 * W 20 *H 25 cm. I made 2 DIY box filter for these and the size is 20 * 10 * 10 cm. When i put these filters in the tank, it gurgles and barely pushes any water out. If i increase the flow rate it just throws out water. I've tried changing into different air stones and messing with the media for better flow but none of them worked. There are 3 tanks and they are all connected to one 20w air pump and the filter is working fine for the first tank. I have not seen / heard nor saw air flow filter acting like this. Does any one have any idea what is going on or if you experienced something similar? I am in desparete need of help.