But I am getting ready to upgrade my fish tank from a 29 gallon tank to a 55 gallon. I will take the 29 gallon tank and use it as an algae scrubber sump underneath the 55 gallon. My plan is to make an in-flow scrubber (IAS 1.0) that will be round in shape. It will have a light or lights in the middle and it will light an algae screen on one side but 100% of the light will illuminate inside the basket. Here is a generic picture I made to give a general idea of this type of algae scrubber.
|In-flow Algae Scrubber (IAS) Design|
Hopefully you can see from the picture above that I will be using a pond plant basket. This basket has holes all in it that will allow water to flow through it. A tall cylinder glass or acrylic container will sit in the middle of the plant basket, holding it down under the water so it won't float. I will then hang a light down into the cylinder. No water will be able to get into the cylinder. This will allow me to illuminate the algae screen under the water from all around. The glass or acrylic container will not get hot because it will be cooled off by the water flowing around it. Here are some pictures as examples of what I will be using:
|Items to make in-flow algae scrubber|
This in-flow algae scrubber will be put into my 29 gallon sump with baffles on each side of it. Water will come in from an overflow from my 55 gallon tank and then flow through the sump across the algae scrubber and then be pumped back into the display tank. I will also have another pump that will flow some of the water to the beginning of the sump again. The main pump will be set on a timer that will only turn on once every hour for only 15 minutes. The 2nd pump will run constantly re-circulating the water numerous times in the sump so the algae scrubber will have a chance to really work at removing nutrients.
The in-flow algae scrubber will also be sitting on top of plastic egg-crate grating that will have air-line tubing running through it with holes poked in it. A powerful air pump will force air into the tube and make micro-bubbles that will fill the basket. The air pump will only run when the lights are off.
The light will be a 23-watt spiral soft white cfl and the light appearance will be 2700k. I may have to up the wattage if growth of algae is slow. I may also add a blue spectrum compact fluorescent bulb later to see what kind of growth I get with that. But for now it will only be the cfl. I plan on running the light 8 hours on and then 8 hours off. I will adjust based on algae growth.
So that's it. This is my first CDMills Design project and I hope it works. Will update with actual build pictures soon and I will also post growth pictures as well. (This build has already changed slightly. Please read about the changes: IAS 1.1)