Algae, Good or Bad ?

[SwampCreek]

The problem I am starting to see is an algae build up. I have to take my pump out and clean it once a week. I dont have any way of filtering, but i did make a foam box to put my pump in. The pump probably is a foot from the bottom of the tank. This algae is brown and stringy, clogging my pipes and clinging to things. Thinking of getting an algae eater to add to it, but doubt it would put a dent in it. I have been taking the pvc apart and spraying it out with a water hose. That takes alot of time to reassemble everything.

Is there any better way to get through this?

[GaryD]

Hi SwampCreek,

Algae should be discouraged in an aquaponics system for the effect that it has on pH aside from anything else. Algae blooms can produce sharp movements in pH - which are bad for fish.

The algae also consumes oxygen which, in a system that may be struggling to maintain dissolved oxygen levels, may be enough to tip it over the edge.

....and, as you've discovered, algae will also block up pipework and fixtures.

Algae is the product of nutrients in the presence of sunlight so my suggestions would be to cover your fish tank to limit the amount of light that can reach it.

I'd also increase aeration and water flow....and limit your feeding......while you resolve the algae problem.

Gary

[SwampCreek]

I think I am kind of grasping the idea of a filter. You say you like oyster shells, which are everywhere surrounding me. (florida panhandle)

Should I add a filter from the pump, before the GB?

Or should I make the GB empty into the filter then to the FT?

I'm thinking that it might take away the good stuff if it is filtered before it reaches the GB.

[GaryD]

Hi SwampCreek,

Should I add a filter from the pump, before the GB?

Yes, the idea is to trap the solids before they enter the grow bed.

I'm thinking that it might take away the good stuff if it is filtered before it reaches the GB.

The plants are not feeding on fish solids but rather the nitrates (and other elements) that are the end product of nitrification and mineralisation.

Gary