Well - as part of my take down process, I dumped a half bottle of bleach in my tank[...]
the next day I ran my light cycle the same and boom - same small patches of dinos.
Very tough little suckers.
You don't go to war against a superior opponent. I'm sure that's in one of those Art of War manuals.
<tangent alert>
Let's see....Sun Tzu at WikiQuotes...gotta be something good in there for battling tough algae!
(Bear with me here....there are always paralells!)
1.2 Chapter II · Waging War
- 故兵貴勝,不貴久。
- 兵久而国利者,未之有也。
- There is no instance of a nation benefitting from prolonged warfare.
1.3 Chapter III · Strategic Attack
- 知彼知己,百戰不殆;不知彼而知己,一勝一負;不知彼,不知己,每戰必殆
- 是故百戰百勝,非善之善者也;不戰而屈人之兵,善之善者也。
- For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill.
1.9 Chapter IX · Movement and Development of Troops
- 数赏者,窘也;数罚者,困也;
- Too frequent rewards indicate that the general is at the end of his resources; too frequent punishments that he is in acute distress.
1.10 Chapter X · Terrain
- 故戰道必勝,主曰無戰,必戰可也;戰道不勝,主曰必戰,无戰可也;
- If fighting is sure to result in victory, then you must fight, even though the ruler forbid it; if fighting will not result in victory, then you must not fight even at the ruler's bidding.