50*25*35 aquarium, with a waterfall filter, can't you do it without an oxygen pump? If the density of fish is small, there is no problem with goldfish,To feed less,Take away all the mess inside,Often poop, if you change waterWaterfall is OK.
Stainless steel bag filter pressure is how to come? Cost wise! Equipment with the same filter area, the price of bag filter is cheaper! However, coarse filter, with bag filter is a good choice! If the fine filter, good with the board frame! Because the minimum accuracy of the filter bag of the bag filter is 1 μm! The plate frame can use a filter membrane of 0.1 μm! Recommend the next unit here: Haining Lianzhong filter equipment. most of the grease factories use bag pressure filters for front filtration, and the rear rod filter is a water removal function. polishing filter refers to the surface treatment of the filter, if it is a stainless steel filter, there is polishing and sandblasting. the safety filter has not been heard. all filters must be safe, and the security filter has it. haha, hope