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New to scrubbers diy

Discussion in 'Algae Scrubber DIY' started by Theo, May 10, 2019.

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  1. Theo

    Theo New Member

    Good day.

    I’ve recently set up anew tank, its a 350g. I live in China and bought this scrubber.

    CED053D6-0F32-4F0D-8A30-FD9DD548337C.jpeg F3FF6A17-4032-4FF6-9CB5-5618E8E9BDB8.png F949BC91-E65B-4B13-8752-188F223A849A.png

    I don’t have any fish in yet but theres a fair amount of GHA in the tank. The scrubber I’ve got has red LEDs, but I don’t have any idea what lumens or wattage. The screen size is 35x16cm. The feed pump is a 1000Litre pump. I’m getting slight hair growth but it’s more of a slime algae.

    So I’m planning to build a waterfall scrubber. I like to feed heavy so I’m planning a 12x8 inch screen build. I will also build a diy LED unit, one for each side. I’ve sort of have a plan to build it but I’m stuck at the lights. I’ve read most of the guidelines and posts by @Turbo, but I still don’t understand it.

    So for this screen size I’ll need about 9x3W leds per side? Is it possible to run both 660nm and 420nm lights from the same driver? I read that to start off I need half the usual power, so can this be managed by the driver?

    I’m clueless here and completely out if my depth. Please guide me in how and what to do.
  2. Turbo

    Turbo Does not really look like Johnny Carson Staff Member Site Owner Multiple Units! Customer

    Hey I’ll try to help here, just having a busy week/weekend. I’ll try to follow up in the next couple days

    No fish, so this is a new system?

    What size tank?

    Any other filtration?
  3. Theo

    Theo New Member

    Hello Turbo.

    I used to have a 125 g tank. Always struggled with turf algae, found out the rocks I bought was filled with crap and I ended up getting a bigger return pump. The turf started to die off and I pulled the ones I could out, 3 minutes later everything was dead.... All my fish, corals, inverts.... Nothing survived as it caused a massive nh3 spike.

    So yes, this is a new setup. So it’s a 350g total water volume. About 40lb of live rock. Flow in tank is 2x maxspect gyres 350. Return pump is a jebao 20000 dcp. Then sump: 1 chamber is protein skimmer( due to the previous tank and trying every method to clean tank known to mankind I ended up upgrading my skimmer) skimmer is a super reef octopus 6000 ext. 2 chamber is 2 boxes of marinepure cubes and this algae scrubber. And last chamber is rive rock rubble, return and heaters and carx reactor.

    I have some fish in qt at the moment. I’ll be adding 2 blue chromis on Tuesday as their qt is finished.

    I don’t have any idea what lumes the lights is but there’s 28 red and 7 white leds.

    The original post was 2 days ago. This is the growth today. It almost looks like a green diatom algae, I say diatom because it makes a bubble type algae on the surface.

    A1167D56-7F04-4870-87C0-82D8CF4201A9.jpeg 0E6FD118-E696-406A-97FC-8668D9E6DBB3.jpeg C3A8135D-F02E-43C0-95D7-15D3F5241282.jpeg

    I’m really scared shitless for this tank going the same way as the previous one....

    Do you think this is what you want and is there anything I can do to improve it, or should I try and build a waterfall scrubber?
  4. arno

    arno New Member

    Do you maybe have link from the place you bought the UAS ?

    Sent from my iPhone using Tapatalk
  5. Theo

    Theo New Member

    In China there’s a site similar to amazon called taobao. Bought it there. Not able to visit their sites from the web though. So don’t have a link.
  6. arno

    arno New Member

  7. Turbo

    Turbo Does not really look like Johnny Carson Staff Member Site Owner Multiple Units! Customer

    Usually, the rule of thumb for the amount of live rock that you want is more like 1-2 lbs/gallon, so offhand I would say you are very short on the quantity of live rock in system. This limits the size of the biological community that can exist. Was 40lb a typo? Did you mean 400 lbs?

    Going by the feeding rule, that screen (with proper flow and lighting) should be able to filter about 8 cubes/day. That's a fair amount of food

    Have you looked at this site? Algae Scrubber Basics - Overview and in particular, this section: Algae Scrubber Basics - Lighting: LED

    Minimum coverage: 12 x 8 = 96 sq in, 96/8 = 12 LEDs per side (that only accounts for Deep Reds)
    Maximum coverage is 2x that quantity, or 24 DRs per side

    You can get away with less than the minimum. You just have to be aware that there may end up being a limitation to the maximum capacity of the screen. Meaning, it's 96 sq in but only lit like it is 72 sq in (or 36, if you go with the maximum coverage equation)

    What I mean by that last statement is that if you plan to use 9 3W LEDs, and you want to achieve the "maximum coverage" number, then you just work that backwards. 9 LEDs covering 4 sq in each, 9x4=36. 9 LEDs covering 8 sq in each, 9x8=72. Essentially, 9 LEDs would be good for a screen within the 36-72 sq in range. If you stretch the screen size further, you're not necessarily going to increase filtration capacity because you are limited by the amount of light you are providing.

    Regarding the full power/half power question: if you design a pair of fixtures such that each fixture uses a separate driver, then you can run both of those screens at 50% by wiring them in parallel and connecting them to only one driver. Then, when your screen matures, you can run them on separate drivers.

    Regarding the violet 420nm LEDs - you can run any LEDs in series without issue. You just would need to verify that your driver can handle the voltage drop for all the LEDs you place on that driver (i.e. add up the voltage drop for each LED). A few side notes: if you are going to use 420nm, you are usually fine running these individually in the series chain along with the DRs. I prefer to run any "supplementary" colors at a lower power. The easiest way to do this is by wiring a pair of these in parallel with each other (so you connect + to + and - to - ) and then connecting that pair in series with the rest of the chain. This way the supplemental color does not create "hotspots" - however, 420nm Violet is less of a concern, it's 455nm Royal blue that will cause hotspots at full power

    Hope that helps for a starter
  8. Theo

    Theo New Member

    Sorry it was a typo, I meant 400lb.

    I found a place that can cnc all the plastic parts, planning on doing it with pp plastic. Also found the heatsink and leds I want to use. So I’ve got a design in my head and if I do decide to build it I want to make a step by step progress with bunch of pictures, because who doesn’t like pictures.

    So for the leds fixture I want to build like a small housing made of black pp plastic and then obviously clear front. How do I get the plastic glued to the aluminum heatsink to make it waterproof? Is there a specific type of material(plastic, abs, pvc, acrylic) I should use to make the housing that I can weld or glue to the aluminum heatsink? And if so, what is the best product to do this? It will not be submerged in the water, but for the odd drops or splashes I want to make sure the light will stay safe.

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