Green and Brown Spot on the glass
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Green and Brown Spot on the glass

This is a discussion on Green and Brown Spot on the glass within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> I have 18 gallon fresh water tank (i.e. L = 22inch, D = 10.5inch, H = 18inch) with FloraMax substrate and filter capacity is ...

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Green and Brown Spot on the glass
Old 04-04-2014, 04:36 AM   #1
 
milindsaraswala's Avatar
 
Green and Brown Spot on the glass

I have 18 gallon fresh water tank (i.e. L = 22inch, D = 10.5inch, H = 18inch) with FloraMax substrate and filter capacity is 800 l/h . My tank is establish from last 5 months.

My stocking is
  1. 3 Gosht Shrimp
  2. 2 Amano Shrimp
  3. 6 Cardinal Tetra
  4. 5 Guppies
  5. 1 Blue Dwarf Gourami

I have some plants are
  1. hair grass
  2. Java moss on dog wood
  3. Anubias nana
  4. Cabomba Caroliniana

I am dosing daily seachem liquid fertilizer as per Seachem Dosing Chart. Due to seachem fert my anubias nana florish with new leaf and hair grass is doing well. I am keeping my lights on for 8 hr a day

I change water every week 40-50%. Today I did 80% water change to clean tank by scrubbing glass with cotton cloth and now it is clean.

My lights are LED light on the hood of the tank. I don't know what is watt per gallon as it is not written on it.

Last week on the bottom of the tank glass is start covering with brown and very small spot of green. I feel issue is over feeding. So from today I will feed every next day. Other thing I feel is light is not good, So I like somebody here suggest which light is good which I can put on my hood.

Please also suggest me please more what can i do it will not occur again
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Old 04-04-2014, 07:39 AM   #2
 
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Sounds like you've got your Diatoms finally! Diatoms or Brown algae are very common in newly set up tanks, new as in around 6 months of age or younger generally. The brown algae will bloom for a few months, usually three at the most and then die off when they've depleted themselves of nutrients. The green sounds like regular green algae unless it's difficult to get off then it is Green Spot Algae or GSA which I find tends to come after a Diatom bloom so you most likely just have the regular green algae.

There isn't much you can do other than wait it out and remove the algae from surfaces if you wish it, if you don't care then just leave it. Although you should rub the algae from the leaves of your plants so it doesn't choke out your plants. The feeding shouldn't really be an issue. I recommend getting some fast growing plants like Water Wisteria and Anacharis which will battle the algae for nutrients and they generally win the battle so it will reduce your algae count ^_^

As for your light, it's not the wattage per gallon that you need but rather the color of the light. LED's generally will give you a low lighting situation anyway unless they are high end LED's from Finnex or someplace else who makes them specially. Wattage is only the amount of electricity it's using so LED's tend to have around .3 watts per little LED bulb. My Finnex Fugeray Plant+ has around 9 watts total I believe but it does a whole heck of a lot more than an Incandescent at 10 watts per gallon.

Part of that is because Incandescent's are just no good for planted tank and also the color of the bulb. Ideally you want 6,500 Kelvin rating or higher for a planted tank. Kelvin ratings are the color temperature of the bulb, 6,500K is the temp of the sun at it's peak in the day when it's nice and clear out. 5,000K is like a cloudy day and then the lower you go, the worse the lighting. You can go higher than 6,500K as well although you won't find that in Fluorescent lighting generally but you will in LED's they'll just be quite costly so it's easiest to just stick with 6,500K CFL's from wal-mart or something.
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Old 04-04-2014, 08:00 AM   #3
 
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Very good and detail explanation

As I told, I change 80% of water and clean the algae. So it is looking clean. This week I will feed fish every next day and don't change any thing.

I will keep updating you guys.
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