Is this iron deficiency? if not, what?

[jack-rythm]

My weeping moss is in a non heated no filtered non co2 tank and doing amazingly well

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[Richardblack5]

It's not that hot in your home is it? ..........yep but i think its the tank lights.. have reduced to 6hrs now

Turn the heater down. its not plugged in

You waste a lot of energy by having warmer than needed temps for many species of fish, if you have Discus, well.............not much way around that. ............No discus

Dropping 5-10C is a huge difference actually.
Many shrimp keepers are around 18-22C, they have nice easy growth.... message understood

Then without looking at the temp differences, claim their no ferts routines are superior............or other oversights or that moss prefers cooler temps.

Moss does fine at warmer temps in most cases if you add enough cO2.[/quote]

 

[scottward]

Plants also grow slower, perhaps 20-30% less at say 30C vs 22 C.

So less CO2 is required metabolically............., this rather than the solubility issue, is likely much more the issue.
Also, gas ppm's increase with colder water for all gases. This includes O2, which is very important to fish. So if the fish are okay with cooler temps, then this is the way to go.

You end up having less CO2 demand and more O2 for the same tank, but slower plant growth(which is often a good thing for many folks). Warmer tanks have a much harder time keeping O2 at those higher levels, fish metabolism also is reduced with cooler temps.

So it's not just the solubility of Co2 at say 29C vs 22 C.............there are a few different things going on there and some good arguments for using cooler temps. But with Discus and many South American species, this might not be acceptable.

Tom, you meant to say plants grow faster at 30 vs 22 didn't you?

Higher temps = higher metabolism etc ?

 

[plantbrain]

Tom, you meant to say plants grow faster at 30 vs 22 didn't you?

Higher temps = higher metabolism etc ?

Yea, common sense prevails over typos.