Freshwater prawn farming equipment covers the same core needs as other pond crustacean culture — a watertight tank, aeration and controlled feed — with growing interest in running prawns through biofloc or a recirculating aquaculture system (RAS) to lift density beyond what an open pond supports.
Crab farming shares the aeration and water-quality equipment but often uses a different structure: because crabs are territorial and cannibalistic when housed together, many indoor operations use vertical crab farming boxes instead of a shared pond, each animal in its own compartment on a shared recirculating water loop.
工作原理
How freshwater prawn and crab farming equipment fits together
Freshwater prawn farming equipment starts with the tank: a PVC tarpaulin tank or HDPE tank holds pond or nursery water, with a paddle wheel aerator or roots blower supplying the oxygen prawns need, especially after feeding and overnight. Some farms report prawn farming in biofloc systems to raise density, using the same continuous-aeration and probiotics approach used for biofloc fish and shrimp.
Where farms want tighter water control, RAS prawn farming recirculates water through a biological filter and a water quality monitor, cutting the water exchange a pond would need. Growth depends on consistent freshwater prawn feed delivered on schedule rather than free-feeding, which fouls water quickly in a closed system.
Crab farming equipment for indoor operations centres on vertical crab farming boxes — a multi-tier structure of individual compartments so crabs cannot fight or cannibalise each other, connected to a shared recirculating loop. This is the basis of most RAS crab farming setups, and the same biological filter and monitoring equipment used for RAS prawn or fish farming applies to the shared water loop.
系统组成
系统组成
Vertical crab farming boxes (crab house)
A vertical crab farming box system stacks individual compartments so each crab is housed alone, avoiding the fighting and cannibalism that make shared-tank crab culture impractical. Each tier connects to a shared recirculating water loop, making this the standard structure for indoor crab farming equipment.
PVC tarpaulin pond tank
A PVC tarpaulin tank gives freshwater prawn ponds and nursery tanks a watertight, low-cost liner, well suited to seasonal prawn culture where a permanent structure is not needed.
Paddle wheel aerator
A paddle wheel aerator is the standard surface aeration for a prawn pond, keeping oxygen circulating through the post-feeding and overnight periods that account for most crustacean losses.
Biological filter
A biological filter converts ammonia from prawn or crab waste into nitrate, the core stage behind any RAS prawn farming or RAS crab farming setup that recirculates water instead of exchanging it.
Aquaculture probiotics
Aquaculture probiotics support the beneficial bacteria behind prawn farming in biofloc systems and help stabilise water quality in ponds and RAS loops alike.
Freshwater prawn feed
Formulated freshwater prawn feed delivered on a controlled schedule supports steady growth without oversupplying protein the pond or RAS loop cannot process — overfeeding is the most common cause of water-quality trouble in both prawn ponds and crab boxes.
Water quality monitor
A multi-parameter water quality meter tracks dissolved oxygen, pH and conductivity across a prawn pond or crab RAS loop, giving an early warning before losses show.
设备
Recommended freshwater prawn & crab farming equipment
A prawn package combines a pond tank, aeration, feed and monitoring; crab operations add vertical crab farming boxes on a shared RAS loop.
SIGMA 单体可叠螃蟹养殖盒配 RAS 系统，单只隔离每只螃蟹以防互相残杀，支持全年室内集约育肥软壳蟹，节省场地空间，循环水便于控温控质。
查看详情 → SIGMA PVC 涂层焊接帆布鱼池，克重 650–900 g/m²，无需混凝土基础，数小时即可完成搭建，是生物絮团养殖罗非鱼、鲶鱼、对虾的标准池体选择。
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SIGMA 浮式叶轮式增氧机为对虾塘与鱼塘增氧并推动水流循环。304 不锈钢叶轮耐腐蚀，配 0.75–2.2kW 省电减速箱电机，多种功率规格可选。
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SIGMA 提供 MBBR 移动床、流化床或滴滤生物滤器，通过硝化作用将氨氮、亚硝酸盐转化为低毒的硝酸盐。淡水海水均可通用，按养殖负荷定制选型，工厂直供。
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SIGMA 多菌株水产益生菌（芽孢杆菌、乳酸菌、硝化菌复配）能控制氨氮与亚硝酸盐、抑制弧菌繁殖并改善饵料系数，适用于罗非鱼、对虾等各类养殖池，提供粉剂或液体剂型可选。
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SIGMA 膨化浮性与沉性鱼虾饲料，蛋白含量 28–45% 可选，适用罗非鱼、鲶鱼、鲤鱼、鳟鱼与南美白对虾等品种，覆盖苗期到成鱼各阶段，饵料系数低。
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SIGMA 多参数水质检测仪可同时测量溶氧、pH、ORP、TDS、电导率、盐度与温度七项指标，提供便携式与在线式两款机型，实时守护 RAS 与鱼塘水质安全。
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Design & operating tips
Size aeration and feed together. A paddle wheel aerator or roots blower sized for post-feeding oxygen demand, paired with a controlled feed schedule, prevents the low-oxygen and ammonia problems that account for most freshwater prawn farming equipment losses.
For crab, house them apart, not together. Vertical crab farming boxes exist because crabs housed in a shared tank fight and cannibalise each other — the multi-tier compartment structure is the practical fix, not a luxury option.
Match density to your water-management approach. Pond prawn culture runs on lower density with periodic exchange; prawn farming in biofloc or RAS prawn farming support higher density but need continuous aeration, a mature biological filter and consistent monitoring to hold that density safely.
Keep the RAS loop matched for shared crab and prawn operations. Where crab boxes and prawn or fish tanks share a recirculating loop, size the biological filter and water-quality monitor to the combined bioload, not to either species alone.
常见问题
常见问题
What equipment does freshwater prawn farming need?
Core freshwater prawn farming equipment is a pond tank (PVC tarpaulin or HDPE), aeration from a paddle wheel aerator or roots blower, controlled prawn feed, and water-quality monitoring. Farms running biofloc or RAS also add probiotics and a biological filter.
Can freshwater prawn be farmed in biofloc systems?
Yes. Prawn farming in biofloc uses the same continuous aeration, watertight tank and probiotic-supported microbial balance as biofloc fish and shrimp, letting farms push density higher than an open pond while managing water quality through the floc rather than water exchange.
What is RAS prawn farming?
RAS prawn farming recirculates pond or tank water through mechanical and biological filtration, oxygenation and monitoring instead of exchanging it, letting farms hold prawns at higher density indoors with tighter water-quality control.
What are vertical crab farming boxes?
Vertical crab farming boxes are a multi-tier structure of individual compartments, each housing one crab, connected to a shared recirculating water loop. Because crabs fight and cannibalise each other in shared tanks, this box system is the standard crab farming equipment for indoor operations.
What is RAS crab farming?
RAS crab farming runs vertical crab farming boxes on a shared recirculating aquaculture system — a biological filter processes waste from all the boxes, water quality is monitored centrally, and each crab stays isolated in its own compartment to prevent fighting.
What feed is used for freshwater prawn farming?
Freshwater prawn feed is a formulated feed delivered on a controlled schedule rather than free-fed, since uneaten feed fouls water quickly in both ponds and RAS loops. Feed rate is adjusted to feeding response to protect water quality.
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