Ok so im getting uv light emperor aquatic 40 watt for my 125g dt question i have is would this help me with cyano ive tried everything in my power except chemicals i believe that if i do t fix the problem chemical are just a temp. Bandaid anyhow ive done water changes out the ying yang cut back on feeding and lighting and at one point it burned off for about a week them boooommm back again i feed every other day and i have 2 skimmers in sump i test phosphorus and nitrate everything looks good but dang cyano back again


