WPG calculation & low, medium & high light? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 23 Old 05-05-2013, 09:31 AM Thread Starter
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Hi Byron,
I think I have the shading sorted out, I have 3 large driftwood pieces you can see in the photo. One is a big hollow L-shaped log that will be Puppy's (my BGK) new home as he has almost outgrown his current tube. It will be sitting on its side not upright like the photo. The second has an inbuilt cave and will sit on its side at the back and reach from the substrate to just under the water line curling forward and blocking the light, I need some low light short plants in front of this pygmy chain sword should do. The last is a flat piece of Mopani about 50x40cm that will sit higher than the substrate like a shelf so fish can swim under or above it. All 3 are very large and will accommodate many caves & hiding places beneath them. The photo is of the 3 pieces with a 33cm ruler. There will also be some leaf litter, lots of floating plants and small pieces of driftwood. Tetras will be a later addition. I do want plants since they will provide natural filtration to bypass the production of nitrate, give shade and security as well as create natural boundaries to territories as well as breaking the line of sight int other territories. I have been having trouble finding South American plants that do well in low light hence my muddled plants list and original question of how many wpgt is low, moderate and high. Plant height is also an issue & since most Echindorus grow to 50cm which would be out of the tank I thought that some stem plants might solve this since they can be cut back easily. I'd be happy with just one type of stem plant, maybe Myrophillum or Bacopa would work? Then there is the issue of availability, the LPS has nothing but stem plants so I have to source everything online.

As to the original lighting issue I have bought another T8, I had to buy the same as the first one since it was the only one I could find with brackets that would fit a 5ft tank (tube is 48in). Its not very flash but it should do the job, its an Aqua Nova and the box says 40w but the tube has 'Degenbao YZ-36w D-HG WATER PLANT AQUARIUM LAMP' there is no mention on either box or tube of kelvins, lux, lummens or colour and the reflector is not even metal ( I only just noticed now as I took the bulb out) it seems to be only the thickness of paper:( As to tube combinations I understand that one could be around 6000 to 7000k range but what about the other one? The original light has been in use for around 16 months so the bulb needs changing anyway.

As much as I would love to have Angels in this tank I still think 18in is not enough height once they are grown (admittedly I have no idea how fast they grow). Puppy can be quite active once the lights are out (sometimes during the day too) I think he would give the Angels a heart attack! When he has outgrown this tank (and I recover financially from doing it up) I will get a much bigger, deeper one which will be more suited to Angels or Discus. I just hope he doesn't outgrow it for a while.

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post #22 of 23 Old 05-05-2013, 10:08 AM
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Most stem plants are higher light requiring, but I have had good results from Brazilian Pennywort. I would get a few (3+) Echinodorus bleherae, the "common" Amazon Sword. Any "large" tank suits this species.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #23 of 23 Old 05-05-2013, 08:48 PM Thread Starter
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I'm not setting up the second T8 untill all the wood and plants are in place and when I do if I see ANY stress at all from my BGK then I will turn it into a moon light. I want him to be happy and he is the tanks longest term resident so he has priority. Funny thing is some days he chooses to lie out in the open where there is no shade at all! I'd actually preffer smaller pieces of wood but I had to choose them big enough for him to hide under. I read the profile and noticed it says he may eat smaller fish but I think the Apisto's will be safe since he has lived in peace with Kribensis before. Tetra's may be different though and it would not surprise me if a few dissapeared. I actually had Brazilian Pennywort on my list but could not find it anywhere, but will do a renewed search.
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light requirements , wpg

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