Physics Experiment Box Junior High School Physics Electrical Experiment Equip

The filter came today, 10 days after ordering well packed and clean, sealed inside a nice box. The build quality is really excellent, the whole filter is quite large, I think the small size is enough for up to a 60lt aquarium, the sponges do not smell, and they are high-quality with very fine pores, dense and durable. I am still waiting for the air pump to set the filter in action. The parts fitted together snugly and not loosely, so I expect it will work like a charm. I bought this as an additional filter to my external one, to put inside the green containers ceramic granulate that absorbs phosphate or silicates or active carbon or to drop in there some peat pellets for peat filtration. So, with this multifunction filter you can achieve 1. water biomechanical filtration and removal of debris and muck with easily detachable filter sponges 2. Water biochemical treatment and conditioning depending on what you optionally put in the green modules (you can also omit them and operate the filter with just the sponges) and 3. water aeration and agitation of the water surface with a nice optical effect. 5/5 stars, highly recommended. The one-way safety valve, air pump and tube, as well as what you want to put in the filter chambers you need to buy extra.

A dog whistle’s sound is on a higher frequency than a human ear could hear, this whistle is a simple and cheaply made whistle which a human does hear. I have better clearer and louder results using a toothpick in chuppa stick pan flute

INCREDIBLY LOUD!!! This will stress your fish to death, keep you awake at night and make your neighbors call the police. Batteries doesn't even last for 18 hours. Your fish will be dead before morning.

Great quality, packaged perfectly, arrived early to Australia, nice item works perfect on my pups that fidget a lot!! Nice and compact... thank you!! Very happy customer!!

Great product, it's really Cheep green Delivered fast and it made the aquarium nicer somehow I like it and I do recumand it Thanks to the Saler Great stuff Thumb up👍

Received item today going to sort fish tank out however the cable is abit short could do with been abit longer but happy thanks to the seller 😀

My birds love this, beak grinding perches can cost so so much! But this is reasonably priced and well made. Thank you! 🥰

Quick delivery and so far pretty happy with it. The product is pretty good quality and looks as shown in the picture.