Emerson White wrote:
I don't see there being any component of a low fish high plant system that would require more work than a plenum (nitrate reactor) I built one of those when I was breeding corals, and it was a lot of work to get it running, and I did a lot more testing after that.
nitrite build-up usually occurs during the winter or cloudy weather, the greens take up the nitrogen faster than the plant can process it. the system of light/heat is unbalanced - it is warm (summer) but the light level is low (winter)
this occurs also in soil based green house systems. one solution is to remove the plant with roots from the aquaculture system and put it in clean water for a few days with sunshine or lights. this will allow the plant to utilize the excess nitrogen
M. Edwards wrote:
I think what interests me the most is the prospect of cultivating a mineral dense freshwater weed so I don't have to buy in kelp for the garden or the animals.
as for water based plants i remember reading about water cress. i know cattails are more of a permie/forager thing than market thing, but how would they do in such a system? are they a 'water' or a 'land' plant?
certainly, but in the case of nitrates in greens, how would a backyarder know it was reaching poor levels?
i'm with you silverseeds all my research over the past 5 or 6 months agrees with you. i never really pieced together in my head that the major difference between the potential that i first considered and the negativity i was reading is that the problem is land based plants.
as for water based plants i remember reading about water cress. i know cattails are more of a permie/forager thing than market thing, but how would they do in such a system? are they a 'water' or a 'land' plant.
thanks for the info, i have a reemerging interest in this. we are looking to start with 1 tank of fish and 1 tank of clams.
i was actually pretty high on my results with my snail tank, but while i would consider eating snails, (not these these are more like my pets now) i would not cook them before eating them. and i have trouble cooking things alive also. (part veg, fish no meat for me)
Mekka Pakanohida wrote:
$15 aquarium test kit?
SILVERSEEDS SILVERSEEDS wrote:
I guess im just more interested in the fish production aspect of it... Im going to put in a metal swimming pool for my fish, (4500gallons, same price as a 180 g stock tank and it will corrode but by then I can be set up with something cement and that will last for life) and grow the plants in kiddy pools. with a charcoal filter for chemicals filtration, and a sand filter to polish it off before going back to the fish. Its going to be real low tech, and extremely productive based on what Ive seen in my tanks this winter, and growing the plants..... a family could produce all the fish they could eat like this for not to much money, and feed them as well. all in their front yard.... I think that is way more interesting then trying to force land plants that show deficiencies and need outside inputs into a system they never evolved to be a part of.... am i really alone in this?
SILVERSEEDS SILVERSEEDS wrote:
silverseeds could you elaborate on what you are saying about the nitrates? are you saying that the leafy greens are becoming unhealthy due to a concentration of nitrogen? this makes some sense. can plants be tested reasonably cheaply to see if this is happening?
Yes, the leafy plants need less outside inputs then other land based plants. theres a few key things land based plants need..
leafy greens can often get by with little or none of that, and grow well, but they build up excessive nitrates. As for tests for such things? well I'm not sure really. you'd have to research it. the same greens can do this in soil as well. but being a water based system, according to many sources its pretty standard. I got the impression it was more like if you grow them like this, it will be an issue. Now if you had a real big growing bed, per amount of bio load they were expected to handle, Im sure it would be much less an issue. I wouldnt know how to tell you how to gauge this though.