У вашего броузера проблема в совместимости с HTML5
My other tank has been going for 3 years. Far easier to maintain than my 100g reef tank!!.
Levels of phosphate should be 0.1 or below for a fish only tank, and nitrate should be below 20ppm.
The prices of the skimmers are the cheapest I have found on the net.
Not the bag of phosphate remover in the hang on back filter, is right near the top of the exit, so the water flows through the media.
The light is not that strong on the tank, so filming the tank and the equipment was not easy.
Both skimmers are 24cm (10 inches) high. 10cm (4inches) square.