How to make a fish tank filter? Filtration system of fish tank,It should be decided according to the characteristic of raising creatures,For example, ordinary tropical fish with ordinary aquatic plants,This kind of grass tank has the lowest requirements for filtration,Low excretion,Small water flow,Basically, five times the circulation of water flow is enough,So almost all the filters on the market (internal filter, upper filter, outer bucket filter, bottom filter, bottom cylinder filter ) Can be used,If DIY,Three slots in a glass grid,Put the filter material in each slot,Open the hole,Just one pump.So you need to figure out what you have in your tank,Can do filtering by hand.Welcome to ask me to stick it with aluminum and plastic plates,Put a biochemical cotton,Two filter cotton,The pump is bought and cannot be made by itself,
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What is the standard of 0.1 million purification workshop? The 0.1 million-level purification workshop standard is the number of ventilation times in clean rooms.1. the number of ventilation times in the 100,000 clean room is not less than 15 times/h.2. the number of ventilation times in the 10 th grade clean room is not less than 25 times/h.3. the number of ventilation times in the thousand clean room is not less than 50 times/h.Purification,Mainly by the clean air flow, the indoor air is constantly diluted,Gradually discharge the indoor pollution,To achieve the clean effect.1. the material of the purification workshop is to purify the factory wall and the top plate. generally, it is made of 50mm thick sandwich color steel plate,It is characterized by beautiful appearance, strong rigidity, good insulation performance and easy construction.2. epoxy self-flowing flat floor or advanced wear-resistant plastic floor can be used on the floor of the purification workshop,There are anti-static requireme
