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From my limited AP knowledge, I think that the raft tank should come before the grow bed because the media in the grow bed will filter out too much of the nutrients needed in the raft tank.
Sorry Chi but I'm going to disagree here, nutrients flow all around the system so it isn't like they are used up before getting back to the fish tank. You want the water to be filtered before going to the raft tank so the original plan is better. I would just suggest that you want more media filled grow bed and for a lightly stocked system you want about equal volume of media bed to fish tank if possible.
Anyway, having the water go through a media bed will filter the solids and allow the bacteria to work on the ammonia and covert it into plant usable nutrients so that the water going into the raft tank will be less likely to gunk up with roots with fish poo and other gunk.
I feel for the termite problem, I've had to replace all my lumber and liner beds due to leaking because of termite damage. I'm now avoiding wood around my AP systems.
Chi Ma said:From my limited AP knowledge, I think that the raft tank should come before the grow bed because the media in the grow bed will filter out too much of the nutrients needed in the raft tank.
:D :D :DHello and welcome. If I may disagree with Chi Ma a little bit, it should be the other way round. Raft beds that fill up with solids are a problem, while you will not experience any of that if you go through media first. The plants that you keep in the media beds will not take all the nutrients. These beds play an important role of trapping nutrient particles and allowing micro-organisms to break it down into finer soluble nutrients for the system's plants to use. Going from tank to raft to media bed will mean that all of the solids will build up under water and gunk up plant roots in the raft. You will go for larger plants such as cucumber, beans, tomato etc in the media beds, and leaf crops in the raft
Chi Ma said:From my limited AP knowledge, I think that the raft tank should come before the grow bed because the media in the grow bed will filter out too much of the nutrients needed in the raft tank.
so what is ever happenign aquaphonics in kenya now,,.
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