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I am Sreenath, and Currently I stay in India. Actually the main question to ask you that, I setup a new Planted Aquarium for my home and recently after 3 day I can see Hair Algae all over my Plants.
Size - 3ft(length) x 1.5ft(width) x 1.5ft(height)
Light - 4 x 20 watt Led Tube (10 hours continious)
Co2 Pressurized Gas - 4 Bubbles/Sec
Fertilizer - Flourish
Filter - UV Canister Filter
1. Cuba Carpet plant having some of the leaves turning yellow/brown, transparent.
2. Hair Algae all over my plants
PLEASE HELP ME REGARDING THIS PROBLEM I NEED A VERY URGENT SOLUTION!!!
Sounds like far too much light, I'd drop that down to 6 hours MAX until plants really fill in. You've got good plant mass, but it's a newer setup so it needs time to establish.
Inadequate fertilizer - Flourish is fine for micro's, but it lacks sufficient amounts of N and P for the plants to really thrive. You need to find a nitrogen and phosphate source to add, if you can get raw materials like KNO3 and KH2PO4, those will do the trick while also adding plenty of K(potassium).
What substrate are you using?
4 bubbles/second doesn't tell me anything. Do you have a drop checker, or have you checked your pH to insure you're getting at least a 1 degree pH drop? When the CO2 is on and has been running for a couple hours, your pH should drop by 1 full degree. I like to test this by filling a vial with water, letting it sit and off-gas for 12-24 hours, and then testing the pH in the vial. I will then take a sample from the tank after CO2 has run for a few hours and test that. The 1 degree rule is a rough estimate, you can get more precise by using the CO2 calculator over at rotalabutterfly.com. You'll need to know your KH for this.
What are your water parameters? GH, KH, pH, ammonia, nitrite, NO3, PO4