algae is a plant, that should be obvious.
for the last few weeks i've been intent on intentionally looking up algae, algae for life plant food, algae because i want it, algae, algae, and some more algae.
thread algae, greenwater (not actual algae), red algae (looking into species currently), ...
i've heard people talk about ammonia, nitrates, phosphates, CO2, PH, light, and a whole bunch of cues of "what causes algae", ... and i've heard of people who mention that everything is good and they still can't get rid of the stuff, ...
it's a plant, and like most plants it will survive in a whole range of environments, some it will barely survive, some it will manage, some it will thrive in, ... like any other plant out there.
i've got 15 hours of light on my tank, ... got greenwater (intentionally), i noticed i suddenly have a drastic iron deficiency.
i'm wrestling with an ammonia issue, treating that, and suddenly i don't have a potassium deficiency. (snail population decimated the bacteria responsible for converting ammonia - have assassin snails to manage this and eventually bring things back into balance)
i am noticing as the ammonia gets out of control the greenwater starts to die back, (very obvious), then again so do the fish.
i don't do water changes, and everyone is going to freak over that, ... to bad, pay attention to what your tank is going through and understand why, and more importantly more intricacies of the nitrogen cycle and keeping things in balance.
with everyone's insistance at "i have to get rid of this algae", and what is going on ? does anyone know why they have algae in the first place ?
if you know why you have algae, if all those magic formulas about phosphates, potassium, ammonia, CO2, Light, PH, whatever other ideas you've got, ... if these were all correct and true, a person should be able to control what they have with proper care and elimite or promote whatever algae you wanted, or get rid of it all, ... because if the ideas about whatever deficiencies were true it would be that easy, it would be that universal that someone could tweak their nutrients in just the right way to promote or eliminate any algae they wanted.
then again, this would ring true for any and every plant.
yet Anubias, what nutrients would have to be tweaked to get rid of it or promote it, ?, or java fern, or various moss's, or whatever other plant you have.
and we can't tweak our nutrients and have various plants burn through their stored starches then die off, we can eliminate a particular nutrient, or have a nutrient in such abundance that it's going to be harmful to our plants, ... but then it's going to be harmful to all plants won't it ?
why the insistence that controlling nutrients is the definitive answer on controlling algae ?
if this was true i'd expect more answers along the lines of "adding X" or "reducing Y" is always going to eliminate a particular algae.
i'm waiting for that, sorta, ... i'm not holding my breath.
the blackout idea is great, ... it starves plants till those that don't have stores of energy die off, it kills those off first, ... then those with minimal stores, and finally those with larger stores, ... this will kill algae, ... and any other non-vascular plant you may have.
be carefull about doing this with green water, ... not all species fall into entirely photosynthetic requirements, some can do both, ... and your not going to get rid of these if it's what is in your tank. (not all are green either - might be interesting to have blood-red water
could throw in a halloween skull or mask to enhance the effect) although i haven't seen any warm water red algae like this (the one species i did see lives on snow)