Riccia having brown patches and spiky moss turning brown

[s0n1c87]

My current setup is from my sakura tank.. I have co2 around 3-4bubbles per second and my lighting is DIY led using 3w 700ma x15pieces on around 9hlours with 2break in-between. So im not sure why is wrong now and my temp is always below 27.5 as i have chiller. Why my riccia having brown patch and not pearling and even the easiest to keep spiky moss also turning brown? Any advice from the pro here?

[Shadow]

tank size? fertilizer? pH? kH? substrate? rough CO2 ppm? bps does not mean anything

[s0n1c87]

http://www.flickr.com/photos/s0n1cb0i/8370201166/

http://www.flickr.com/photos/s0n1cb0i/8369135995/

[s0n1c87]

tank size? fertilizer? pH? kH? substrate? rough CO2 ppm? bps does not mean anything

Hi bro. my tank is 2.7feets, no fertilizer, ph 7.8, im using ada new amazonia soil. ppm not sure as i dont have the meter.

[Shadow]

something not right, ADA amazonia should not give you pH 7.8 unless you add coral chip. I saw both CO2 and air pump working together. My guess your tank lack of CO2.

[s0n1c87]

something not right, ADA amazonia should not give you pH 7.8 unless you add coral chip. I saw both CO2 and air pump working together. My guess your tank lack of CO2.

my ph so high because before this scape i have. I was doing iwagumi and i used alot of rocks. i removed all of them and did water changes but no luck to bring my ph down.. since my shrimps are not dying so i just left it as it is. i pumping o2 cause i met one shrimp bro, he said is gd to having more oxygen than lesser.. So what do you think i should do?