Jason, as has been repeated several times, killing, but not removing the FA just recycles the nutrients in your pond. Like trimming a fingernail, it looks good for a while, but will grow right back. Ultrasonic will NOT "eliminate" your algae, IF it even works at all, it leaves the same issues with decay and only re-starts the algae growth cycle. Algae grows due to an abundance of nutrient, unless that nutrient is consumed by other plants/fish, or removed, NOTHING will eliminate it from growing again.
Raking the FA out is a LOT of manual labor, buy worth it by giving other, slower growing, eye pleasing plants a better chance to grow. Once other plants get growing, there is far less nutrient available for the algae to reproduce and grow.
Last edited by Rainman; 05/28/14 08:13 AM.
