Join Date: Aug 2019
Location: Washington State
Be real careful when heating up that diffuser to bend it. They make it look really easy in the video but I almost melted a hole in mine when I did it. It will go from seemingly stiff to molten very quickly. I'd maybe recommend holding it an inch or so over a candle and moving it back and forth for a while instead of holding it in the lighter flame like the video shows. Otherwise that is a great diffuser and makes nice tiny bubbles. Only reason I replaced mine was to go inline.
With your size tank you probably don't need to worry too much about placement of the diffuser. If there is any current at all the diffusion should be fine. I have seen many great looking tanks here and in stores that seem to have most of the bubbles rising straight to the top.