Fish and plants are not married
Maintaining a perfect balance in aquaponics is not easy because fish and plants need different types of water so keeping both of them in the same water they will be fighting to pull the water where they need the quality to be. tis all one big compromise keeping fish and plants in the same ecosystem.
most small backyard systems will generate enough plant produce to satisfy the owner and alot of people dont kill the fish but in owner operated systems for profit we want to get the most out of our systems to make a profit and to minimize the amount of inputs we have to source
This post will tell you what you need to know to make sure you select a decoupled aquaponic system that will let you successfully grow fish and plants at the ideal pH and water quality necessary to create the fastest speed and quickest turn over possible.
Control is what you need
If you are looking for a easier more resilient way to grow food then, the best method to ensure you end up with something that lets you control exactly what each process in aquaponics needs to operate the most efficient it can is by looking for these things:
Make sure your water circulation flow lets you disconnect the plant components from the fish component when necessary. If it doesn't, you'll have trouble if your plants or fish need something that may harm the other eg. slowing the water flow down.
Ensure your aquaponic system has a good solid filter backwash so you can transfer the amount of water that the plants lose to transportation and still maintain good water quality for the fish by quickly removing solids.
Automation automation automation
Any good water support system should let you control the time, quality and amount of water being transferred between plants and fish. This is important because by doing this you greatly reduce the need for chemical water conditioners.
While not necessary, some great bonus features of a great decoupled system are self cleaning filters, auto top up from the mains water supply, and automatic water quality parameters monitoring so you can spot trends.
Now that you know the benefits of a decoupled aquaponic system you are ready to look into this type of growing without worrying about start up times and not having enough nutrients in the system to feed the plants because the fish are too little.