Hi, I'm not asking, but proposing this topic as a place to collect this information in one place for anybody to use.

Continuous or prolonged feeding devices:
- for small polyped corals,
- for a fish, requiring frequent feeding,
- add yours.

Both high tech and basic (like water bottle-based), serving both ends of the hobby.
Own experience and links, if you you tried something - post how it worked for you.
OK?

Ok, im going to dig up photos of something a guy in the local reef club made. He took one of those small dorm fridges and a stainless pressure sealed container go's inside of it. It has a pump on it and some dip switches. You can set it to feed as often as you like. what it does is right before it sends food to the tank it blows air into the food container to mix everything up then reverses and sends food to the tank for a set amount of time. When its done feeding the pump reverses again and cleans out the line. Pretty cool setup. Ill see if i can get the guy he sold it to to come over and talk about it more.

Something similar to what you said is shown here, 3rd row, last thumbnail. Pump is not visible, only fridge. If this is commercial links, sorry.

Another continuous feeding device for corals:
Marcus Nitzsche:

Auto Feeder:
I wrote that I use a modified Eheim Twin feeder. I disconnected the internal control unit and connected the motor drive directly to an external time controller with impulse logic. So I can run the feeder for e few seconds only and dose very less food. I dose (I guess) 20 times per day food for 5 seconds. The food I add short before my return pump in the tank sump – so it get mixed very well with the water and the distribution in the tank is good. To avoid blocking of food I use a high technology vibration device! It is a small (4x4 cm) fan (from pc main board) that I clued at the side of the feeder. Than I fixed a small nut at one wing of this fan – therefore it results an imbalance. So if the fan is running a vibration of the feeder can be monitored. Without this device it is not possible to dose that small amount of food (because food doesn’t fall down from screw feeder, it clues at the casing…).

Joanxavier. This forum is in Spanish, you can use Google Language tools and paste URL under Translate a web page.
Liquid food container with siphon to tank or refugium (to compensate removed liquid), food inside kept suspended by the pump (air or not?), peristaltic pump provided continuous dosing.

Joanxavier again multiple syringes dosing device. What I like - the good illustrations.

Prolonged feeding devices:
1. Danny Dame, frozen cubes slowly melting in container (Kalkwassermixer from Aquacare), connected to dosing pump. Drawback: clogging, after some time.

2. Jens Kallmeyer, particularly like this approach:

I fed mine basically 24/7, by preparing large batches of food that I frooze in 15 ml centrifuge tubes with the tip cut off. Every morning I take a tube out of the freezer and put it into a lager centrifuge tube with a bigger hole at the bottom, hanging above the intake of the return pump in the refugium. Over a couple of hours the food slowly thaws and drips into the water where it is sucked up by the pump and spread into the main tank.
When I came home after work I exchanged the tube for a fresh one, before I went to bed a third one was added.
There are two different kinds of food, I called them day and night food. The day food contains all the stuff for the corals, as well as the frozen fish food (Mysis, Artmemia, shaved clam, shaved fish, etc). The night food contained just the coral food.

3. The same, but simplified, by icyuodd at Nano-Reef forums (can't find like, sorry, 2006): placing frozen cube onto air intake on Maxi-Jet powerhead, that was near the top of the tank. As cube thaws, food dripped and was distributed in the tank by flow.

More will be later, as soon as I find links.

Cool subject again, These type really get my going.

Heres photos of the auto feeder. It was made by safecracker (of safecracker red zoa fame) I only took photos of the business end.







Food canister



inside of lid

non-photosynt wrote:Something similar to what you said is shown here, 3rd row, last thumbnail. Pump is not visible, only fridge. If this is commercial links, sorry.

Another continuous feeding device for corals:
Marcus Nitzsche:

Auto Feeder:
I wrote that I use a modified Eheim Twin feeder. I disconnected the internal control unit and connected the motor drive directly to an external time controller with impulse logic. So I can run the feeder for e few seconds only and dose very less food. I dose (I guess) 20 times per day food for 5 seconds. The food I add short before my return pump in the tank sump – so it get mixed very well with the water and the distribution in the tank is good. To avoid blocking of food I use a high technology vibration device! It is a small (4x4 cm) fan (from pc main board) that I clued at the side of the feeder. Than I fixed a small nut at one wing of this fan – therefore it results an imbalance. So if the fan is running a vibration of the feeder can be monitored. Without this device it is not possible to dose that small amount of food (because food doesn’t fall down from screw feeder, it clues at the casing…).

Joanxavier. This forum is in Spanish, you can use Google Language tools and paste URL under Translate a web page.
Liquid food container with siphon to tank or refugium (to compensate removed liquid), food inside kept suspended by the pump (air or not?), peristaltic pump provided continuous dosing.

Joanxavier again multiple syringes dosing device. What I like - the good illustrations.

Prolonged feeding devices:
1. Danny Dame, frozen cubes slowly melting in container (Kalkwassermixer from Aquacare), connected to dosing pump. Drawback: clogging, after some time.

2. Jens Kallmeyer, particularly like this approach:

I fed mine basically 24/7, by preparing large batches of food that I frooze in 15 ml centrifuge tubes with the tip cut off. Every morning I take a tube out of the freezer and put it into a lager centrifuge tube with a bigger hole at the bottom, hanging above the intake of the return pump in the refugium. Over a couple of hours the food slowly thaws and drips into the water where it is sucked up by the pump and spread into the main tank.
When I came home after work I exchanged the tube for a fresh one, before I went to bed a third one was added.
There are two different kinds of food, I called them day and night food. The day food contains all the stuff for the corals, as well as the frozen fish food (Mysis, Artmemia, shaved clam, shaved fish, etc). The night food contained just the coral food.

3. The same, but simplified, by icyuodd at Nano-Reef forums (can't find like, sorry, 2006): placing frozen cube onto air intake on Maxi-Jet powerhead, that was near the top of the tank. As cube thaws, food dripped and was distributed in the tank by flow.

More will be later, as soon as I find links.

Marcus and 2 are banned from the forum.

Reefdaddy:
Sorry, I didn't know about that.
Sent PM to you with question where to find banned list to check before posting.

chris&barb:
Can safecracker add a short description what was used and how it's operated? Thanks.

Ill try and get the person he sold it to to comment on it

Santa Monica is working now on continuous feeding device for corals, that includes cooling food mix in wine chiller and small feeding pump, all detail included.

Device for continuous feeding live foods to feather stars by philter4, used with permission:

Air bubbling inside jar keeps food suspended, airline valve regulates speed of dripping, return pump delivers food to the tank.

Hey NP did you find anything else out on this?

I asked the person that has the feeder i posted about to come comment on it but i guess they dont want to. The guy that made it gave a demo on this at a club meeting a few years ago and i recorded it. Hopefully i didnt record over it. Ill look and see if i have it and if i do ill load it up to youtube and post it