The plants in the tank were flourishing with no algae until an aquarium heater malfunctioned and overheated the aquarium to 105 degrees, killing all the angel fish. Afterward, new fish were introduced and extreme ich treatments interfered with the stability of the tank, affecting the plants and introducing an algae infestation.
There are black “spots” covering the older plant growth and on hardscape that is hard and cannot be removed (not present on glass), spreading to newer growth after about 2 weeks. Photos are below. Also, there is green algae on the plants, glass, and hardscape that scrapes off in flakes from the glass with the scraper blade but cannot be removed from the plants. There were ramshorn snails in the tank prior to the acaras ingesting them.
Parameters:
Nitrates: 25
Phosphates: 1-1.5 (with added Phosguard, Tap water : 2 ppm)
Kh: 3
Gh: 9
Lighting: Current Satellite LED Plus Pro, 7 hrs, 100% intensity
Tank Size: 56 gallons, ht: 25”; length: 30"
Plants: cryptocorne, sword, bolbitis, red lotus
Fertilizer: Aquarium Co-op Easy Green once a week, Easy Iron once a week; (previously Seachem Excel daily)
Filter: Fluval 407 and sponge filter with Seachem Purigen
Flow: Circulation pump and air stone
Water changes: 40% every 3 weeks
Stock: 2 Electric blue acara, 6 panda garras; 2 nerite snails
Would CO2 injection help to correct this issue?
Thank you for your time and help,
Byron Russell
