Continuous feeding methods

LobsterOfJustice

Recovering Detritophobe
Hi everyone,

I would like to have some discussion on automated continuous feeding methods. I guess these mainly fall in to two categories, live foods and nonliving foods.

I first thought about ways to feed frozen foods throughout they day. I imagined something silimar to a kalk stirrer which would come on to stir up the food, and then a pump would come on to flush a portion of the food into the tank. This entire unit could be sat in a mini fridge and new cubes of frozen food could be added every morning.

I then thought automated living cultures might be even lower maintenance. I started with the idea of a rotifer culture which was would be auto dosed into the tank throughout the day. Then got the idea of hooking up a phyto culture inline before this - so a pump comes on and adds a certain amount of rotifers in the tank, then another pump comes on to replace the lost volume in the rotifer culture with phyto. Then, the water in the phyto culture could be replaced with another pump feeding from a fresh container of saltwater, or, even better, the phyto culture could be fed with water from the aquarium which has been run through a UV sterilizer. This could result in an automated way to add plankton to the tank as well as recycling the nutrients in the aquarium back into the food (essentually a plankton refugium). It seems like a pretty simple concept. I have seen setups for culturing and dosing live foods before but they seemed more complicated. If you already have a controller, pumps are less than $100 so if this system would work it could be set up relatively cheaply (couple hundred bucks) and would be essentially completely automated. Am I missing something?

Who else is using some form of automated continuous feeding? What other methods are there?
 
seems like a interesting idea! id like some more input on it from others but def something worth looking into!
 
I'm building a custom tank (10 gal) with almost this exact feature. The plan is to feed some of the calcium reactor (also custom miniaturized design) effluent through a 0.5 micron nylon filter and then through a UV sterilizer into a phyto-culture. The phyto-culture overflows into the tank (with an attached refugium for rotifers/pods). For the phyto-culture volume, I'm expecting 1 to 2 drops every minute or so at steady state after a month or 2 of initial growth.

I'm thinking of having steel-wool in the phyto volume for iron leaching and phosphate absorption. I think it will be important that phosphate be the limiting nutrient, CO2 will hopefully be feed like in a planted freshwater tank. Maybe occasional doses of F2 or miracle grow also. I think having a large, constant amounts of live phyto is a major missing element in reef aquariums. I think it will create a very clean and high-nutrient environment, possibly for goni's.

Hopefully phyto will be consumed and reproduce in the tank as well so skimming (also custom) out excess phyto will be a major nutrient export. Maybe skimming during the day only to maximize zoo-plankton concentrations.
 
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In this photo you can see the partially assembled tank, sterilizer, micron filter material, CO2 canisters and regulator, skimmer parts, and acrylic welding solvent. I'm excited for this project. Been working on it for almost 4 months. My first attempt at building the tank failed (crazing and cracks when I turned on the pump).
 
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On my big tank,a 6000g brand new(:, I have a feeding system with phyto and zoo which is very close to what you described. on my small tank (50g) I have an aluminum container filled with frozen foods, cyclop-eeze, spirulina, phyto and zoo+ vitamis and aminos. A pump sits inside the mixture, connected to a tube that goes out of the container and splits into a Y. An electric shut-off valve controles where the food will go: back to the container to stirr the food or to the tank to feed the fish, corals etc. The whole thing is cooled by a 120w thermo electric cooler.
 
I ran across the Zinn Plankton reactor in a description of one of the older TOTM (June 2003) threads. It appears to be an elegant way to culture phyto- and zoo- plankton in the same device. It's basically a small tank, divided in two, with a small mesh screen in the divider that is too small to pass either zoo- or phyto- plankton (n.b. - won't pass EITHER culture). On the phytoplankton side, there is an air-lift pump constantly pumping a small amount of the phyto culture through a second, suspended mesh screen that is large enough to pass the phyto, but too small to pass any zoo. This airlift provides circulation, promotes gas exchange, and by passing the output through an elevated (out of the water) filter, will trap and kill any zoo- that find their way into the wrong side of the tank. On the other side of the divider, the zoo culture is active. A second airlift pump will periodically pump some of the phyto culture over the divider and into the zoo side, to keep them fed. Waste byproducts from the zoo side will pass through the ultra-fine filter in the divider and act as nutrients for the phyto. With the addition of light for the phyto, and a small amount of fertilizer (orchid food appears to be recommended), the system can supposedly run continuously for months, maintaining a healthy zoo culture (which can either be manually exported to a display tank, or connected by another airlift pump on a timer, if the culture can gravity feed into the display).

Caveat--- this is all based on my best efforts with google translate and some older thread searching. I plan on giving this a try (in a 5 gallon tank in the hood of my display) when I get my new tank set up, but can't vouch for it.

Here are a few of the links I mined for this information:

http://www.zinn-aquarientechnik.de/planktonreaktor.html
http://archiv.korallenriff.de/reaktoren.html
http://reefkeeping.com/issues/2003-06/totm/index.htm
 
BUMP

This phyto culture stuff sounds like it could work. You'd have to make sure the UV filter never quit sterilizing, or it could decimate the phyto culture. The UV filter would have to periodically turn on to feed the phyto. If it ran constantly it would kill all the phyto floating in the tank. Maybe it could turn on to fill a reservoir, which drips into the phyto culture.

If you're only dripping in new water, water will only be dripping out of the rotifer culture. IDK how well that will feed rotifers. Might need to have a pump turn on to dose the culture to the tank, and then shut off and allow the phyto drip to refill the rotifer culture.
 
Hi everyone,

I would like to have some discussion on automated continuous feeding methods. I guess these mainly fall in to two categories, live foods and nonliving foods.

I first thought about ways to feed frozen foods throughout they day. I imagined something silimar to a kalk stirrer which would come on to stir up the food, and then a pump would come on to flush a portion of the food into the tank. This entire unit could be sat in a mini fridge and new cubes of frozen food could be added every morning.

I then thought automated living cultures might be even lower maintenance. I started with the idea of a rotifer culture which was would be auto dosed into the tank throughout the day. Then got the idea of hooking up a phyto culture inline before this - so a pump comes on and adds a certain amount of rotifers in the tank, then another pump comes on to replace the lost volume in the rotifer culture with phyto. Then, the water in the phyto culture could be replaced with another pump feeding from a fresh container of saltwater, or, even better, the phyto culture could be fed with water from the aquarium which has been run through a UV sterilizer. This could result in an automated way to add plankton to the tank as well as recycling the nutrients in the aquarium back into the food (essentually a plankton refugium). It seems like a pretty simple concept. I have seen setups for culturing and dosing live foods before but they seemed more complicated. If you already have a controller, pumps are less than $100 so if this system would work it could be set up relatively cheaply (couple hundred bucks) and would be essentially completely automated. Am I missing something?

Who else is using some form of automated continuous feeding? What other methods are there?

I have 2 refugiums over my display tank that have chaeto and a huge amount of pods. I will be adding shrimp next. Water is pumped up from display tank and a constant supply of pods is brought down by gravity.
 
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