I have 2 tanks running that are treated fairly similar just slightly different light levels and a few dosing differences. Tank 1 has no issues (aside from a bit of minor dot/dust algae) while tank 2, does. so it's not my tap water, it's gotta be something I added, or didn't add correctly, etc....
here's my general dosing scheme and setups
tank 1:
10gal. Endlers & cherry shrimp w/ ludwigia, HC, xmas moss, wendtii crypt
30watts 10hr/day
10% weekly water change w/ tap water
tank 2:
29gal. (most fish removed 2months ago) 3 mollies w/ rotala indica, HC, microsword, blyxa, anubias, sunset hygro, kleiner bar sword
65watts 10hr/day
10% weekly water change w/ tap water
dosing:
Excel:
tank 1: 1ml daily
tank 2: 3ml daily
Flourish:
tank 1: 1ml wed/sun
tank 2: 3ml wed/sun
flourish iron:
tank 1: 1ml mon/tues/thus/fri
tank 2: 3ml mon/tues/thus/fri
flourish trace:
tank 1: none
tank 2: 5ml tues/sat
I have potassium supplements that I'll add occasionally when I remember. I recently was unable to do water changes on tank 2 (29gal) for about 3 to 4 weeks and only added water as it evaporated. I was however still able to do water changes on the 10gal. Additionally I recently downgraded my light last month from 130watts to 65 because I had to stop additional co2 for a couple of months. Prior to that, I had a hair/thread algae outbreak and attempted to kill it via an excel overdose, which seemed to work.
I have noticed an increase in green spot algae since I lowered the light but I assume that's due to lower phosphates (no longer any fish in the tank really) rather than anything serious.
Could excessive Excel becausing these dots? Or do you still think it could be calcium deposits?
thanks for the help & advice.
-josh