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20g high low light plants not doing well

1852 Views 11 Replies 7 Participants Last post by  Surf
Hey all, I would appreciate some help with my planted tank. It has been established for about five weeks. Since then the plants have not been doing well.

The tank is a 20gallon high. The plants I have are java fern, amazon sword, cryptocoryne lucent, and an anachris. The only plant that is doing okay is the crptocoryne, yet it still is developing yellow/brownish spots. The java fern is black. The amazon sword leafs look thin and pale. The anachris is fine but it is a new addition. I previously had hornwort in the tank but that has since died.

For substrate I have caribsea eco-complete. For lighting I have the nicrew led and a 15w T8 TropicSun 5500k feature. The lights are on for a 12 hour period. I am also dosing Flourish Excel and aquavitro envy.

Any help would be greatly appreciated!
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I have been dosing nitrogen and phosphorus as well as the liquid carbon and envy for about a week now.
You are dosing only 2 of the 6 macros and no micro nutrients. Based on the picture I see evidence of calcium and magnesium deficiency.

I would recommend getting Seachem equilibrium, and a micro nutrient fertilizers. Equilibrium is a gh booster that will provide calcium, magnesium, and sulfur. With the NPK you are now dosing that will cover all of your macro nutrient needs. Add enough Equilibrium to increase hardness by 2 degrees GH.

For the micro nutrients I would purchase CSM+B. These 2 plus your NPK should cover everything except chlorine, or nickel. Most tap water has enough of these 2 micro nutrients. If you are not using tap water add 2ppm of sodium chloride (table salt) that will resolve the chloride problem. there should be enough nickel in you fish food to do meet the plant need.

With the above fertilizers your inert substrate will be fine. No need to replace it.

I see no reason to continue using Envy. it is doing nothing for your plant. As to your liquid carbon it will damage and even kill Anacaris. Anacaris on of the few plants that is not compatable with liquid carbon. Liquid carbon if dosed incorrectly can kill everything in your tank. So My preference is to drop it and increase aeration of your tank water.
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