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UV's do nothing for spot algae.
Regards,
Tom Barr
[quote:2f0c0b0b78="David"]Hi mervin
nope its good for spot algae control.......its been two weeks since I scrapped my tank for spot algae....[/quote:2f0c0b0b78]
hello David,
looks like u are doing some thing right here cos i'm also running a 11W UV without sucess..........
UV's do nothing for spot algae.
Regards,
Tom Barr
Guess what guys? I've dosed my PO4 until it reached 2mg/l and my amano's are starting to die, but my cherry shrimps are still fine, looks like amano shrimps can't take that high PO4 level. Will just maintain at the max of 1.5mg/l of PO4
my PO4 at 0.4ppm. NO3 at 5ppm. ammonia not registered. K 25ppm. Fe 0.5ppm. plant growing okie but still spot green algae...
I have shrimps and PO4 at 2-3ppm, they did fine.
There is no reason phsiologically a shrimp would not do well at high PO4 levels, they use it as a pH stabilizer with buffers at much higher levels(10ppm+ etc).
If it harms critters and fish, they'd have many issues on their hands.
Liuhao, add more CO2, and add a tad more KNO3 and PO4.
GS means you need to tweak your PO4/CO2 more generally.
Regards,
Tom Barr
[quote:58eb978aa4="Plantbrain"]I have shrimps and PO4 at 2-3ppm, they did fine.
There is no reason phsiologically a shrimp would not do well at high PO4 levels, they use it as a pH stabilizer with buffers at much higher levels(10ppm+ etc).
If it harms critters and fish, they'd have many issues on their hands.
Liuhao, add more CO2, and add a tad more KNO3 and PO4.
GS means you need to tweak your PO4/CO2 more generally.
Regards,
Tom Barr[/quote:58eb978aa4]
thank you for your info. my CO2 is stable at 25-30ppm during photoperiod. it's controlled by a ph controller.
how much NO3 and PO4 then? how about NO3 at 10ppm and PO4 at 1ppm?
Bump the CO2 just a tad higher.
I'm not to reliant on pH controllers due to KH changes which drop/reduce CO2 often if they decrease. Also, sometime the mesurements seem off for other reason and the plants are not looking quite right etc.
I do not know how big your tank is, tell me and I'll tell you what and when to add it(KNO3/KH2PO4/Traces).
Regards,
Tom Barr
www.BarrReport.com
[quote:f6fc11567f="Plantbrain"]Bump the CO2 just a tad higher.
I'm not to reliant on pH controllers due to KH changes which drop/reduce CO2 often if they decrease. Also, sometime the mesurements seem off for other reason and the plants are not looking quite right etc.
I do not know how big your tank is, tell me and I'll tell you what and when to add it(KNO3/KH2PO4/Traces).
Regards,
Tom Barr
www.BarrReport.com[/quote:f6fc11567f]
yes my KH is changing. after water change it's 4. one week later it will be 5 and two weeks later it's 6. i have to adjust my ph controller accordingly. i also calibrate the ph controller monthly.
my tank is a small one. 2ft x 1ft x 1ft. using eheim canister 2028 and external co2 reactor. total amount of water is 60 liter. my light is 2 x 20W ADA FL tube.
some recent pictures can be seen from here:
http://www.arofanatics.com/members/l...scaped-010105/
thanks a lot.
Well I don't know what killed my amanos suddenly, but it only happened after I dosed the KH2PO4. Its probably something else I guess. Tom, I'm still trying to find out the best PO4/CO2 target to maintain to get rig of my Green Spot/Green Dust algae on my anubias and tank walls. My kH is a constant 3 and my ph is around 6.4-6.5 for the entire photoperiod. I'm currently maintaining my NO3 at 5mg/l and PO4 at 1.0-1.5mg/l. What should I try next anyone?
the problem is that you are using a controller to make the pH stable, but the CO2 is changing as the KH changes.
A controller will not give you precise CO2 in the KH is moving/moves as well.
Often times the KH moves as the tap water source changes etc, then folks add too little generally.
T%he target for GS is the same target I suggest for most things, 1ppm PO4 or more, 10ppm of NO3, lots of traces, CO2 30ppm etc.
Make sure these conditions are maitained and that you agressively prune and maintain things. Once whipped into shape(1-3weeks tops), you can take it easier.
Regards,
Tom Barr
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