My plant tank experiences occasional hair algae growth. I think the conditions are pretty optimal, except for the phosphate. I tested the tap water and phosphate is actually higher than in my tank! Can I do something to remove the phosphate from the tap water or use RO and add minerals/trace elements? I used to keep a reef tank and always used RO water, but understand that I can't use straight RO for freshwater fish. Still, the tap water is filthy.
Thanks for the help in advance!
Here's the rest of the info:
1. Tank size
Pls post the water capacity(in liters or gallons-US or UK) and the dimensions.
2. Watts and type of lighting
Types would consist of metal halide, fluorescent, incandescent, etc. Also, try to add how many wattage and the light color including full spectrum. The light chart is also available as a link in the sticky in this section(Plants).
One 65W Coralife compact fluorescent and one 15W standard fluorescent plant bulb
3. Number and types of plants
Pls type the species of plants and how many do you have.
Jungle val, crypts and hygro densely planted over 80% of substrate as well as Java Moss
on two large pieces of driftwood
4. Substrate type
This is added since there are other kinds of gravel like the Fluorite, etc.
Standard aquarium gravel
5. Age of tank
How long has your tank been establishing?
The tank is about 22 years old, but has been set up in this manner for only about four years.
6. CO2 injection
Do you use CO2 injection? Is it DIY or pressurized?
It's a store-bought sugar/yeast reactor.
7. Water Parameters
a. GH ?
Iron 0 (I add an iron/potassium/trace element fertilizer once or twice per week, but can never measure any iron using two different kits (Red Sea and Seachem).)
b. When test was performed, (after a water change, middle of the week, first thing in the morning, late at night, etc.)
Two days ago about half-way through the tank's 12 hours of light. I did a water change about 5 days before the test.
8. Detailed description of plant problems
Not just brown spots, brown spots in the middle of the leaves of both old and new leaves as well as some spotting on the edges and missing plant tissue where spots used to be.
Green hair algae grows occasionally everywhere--glass, wood, and on the plant leaves. It will grow rapidly and then will go away after a few weeks only to return every few months.
Other important info:
Fish: The tank contains a krib, two very elderly barbs, three ottos, two flag fish, and a khuli loach. There are also loads of little snails. They don't harm the plants.
filtration: Standard ug filter with a powerhead and a small Whisper power filter on the back (I only change the carbon about every 3 months to avoid too much iron removal).