This is about the introduction of the LED Round Bubble Light, also recommend matching with the other related items, the LED bubble can be better effect.
I strongly advise to familiarize yourself on what a review is. There’s plenty of videos on reviewing products. This is a commercial not a review.
That depends on the air pump itself. You can have that specific air pump model shown (which Mr. Wong forget to mention) or have some inline T-connector that restricts the air flow.