aquarium...check. lights...check. plant life...help!
Algae has started growing in my tank. I just recently upgraded my lights and i believe i have excess lights and/or phosphates. After reading an article on another site and finding that excess phosphates could also cause algae i have gone and got a phosphate test kit. I am now in the process of trying to balance my ecosystem for max plant growth (for my personal set up) to help fight off the algae.
ammonia - 0ppm
nitrite - 0ppm
nitrate - 20ppm
phosphate - .5ppm
what do you think i should do to up plant growth and minimize algae? For the most part i have slow growing plants. Anubias, Crypts, and a little faster growing Wisteria.
This is in a 20g tall with 2 t5 ho lights. ZooMed Flora Sun 5000k and ZooMed Ultra Sun 6500k. Lights run about 7.5 hours a day. I want to get everything balanced before introducing CO2, from what i was reading, CO2 is really the last component in the balancing of a planted tank. Inert substrate and no ferts at this time.
Seachem's flourish comprehensive once per week.
Are there fish in the tank? Plants grow better when there are and I don't see any listed in the profile... plants love the ammonia they produce. I doubt you are near needing CO2 until you get some fertilization going and see how they react.
I'm not sure you should be concerned with the phosphates, I've never measured so I don't know if I even have any to compare, but if you just did a 50% water change you could cut them in half.
I wouldn't be so quick to add CO2, but that's up to you. On the surface it would just seem that the increased lighting has caused more algae to grow - perhaps just cut back on the duration of the lights?
Is your tank in direct sunlight, perhaps from a window? This combined with intense lighting can also increase algae blooms. Maybe lessen ur tanks exposure to light, both natural and electrically sourced. The more plants added, the more they will overwhelm algae's absorption of nutrients in the tank too...Algae in a newer tank is common...once fish along with plants are cycled in successfully, usually the tank gets in a groove and blooms lessen. Some algae is normal, as it is a living organism like anything else, also a limited (very limited) presence means a successful habitat has been created....an abundance simply means an imbalance is present... I've had a planted tank running for over a year with fertz, lighting, co2, the works - there is still an occasional small bloom necessitating a glass scrub - but the above groove, water changes, plants, etc keeps it down....I had a huge algae bloom when this tank started too, Huge!.... Balance takes awhile to create..... In the meantime, can u share a pic of how large a bloom this is and ur tanks positioning in the room?
What type of algae is appearing? Sometimes this requires a different approach to handle it. But we can generally say that light is presently your problem (assuming this algae is a green or red species). You have too much light to balance the minimal nutrients, so plants cannot use it and algae will take the advantage.
Phosphates is rarely the cause of algae, perhaps even never; Walstad mentions her tanks have between 1 and 5 mg/l (= ppm) phosphates, and she has (so she says) no algae issues.
Nitrates at 20ppm is on the high side. What is your water change routine? And have you tested the tap water on its own for ammonia, nitrite and nitrate?
I wasn't sure from your post...do you definitely intend on adding CO2 diffusion? Or was this just the next step to combat algae? If the latter, it won't.
I agree with the previous suggestion to up your complete nutrients via a liquid supplement. Flourish Comprehensive is good, or Brightwell Aquatics' FlorinMulti. Also, be prepared to reduce the light period; two T5 HO tubes is a lot of light intensity. Was there a reason you upgraded? And what did you have previously (when presumably algae was not problematic)?
Thanks for the reply guys. I have recently heard a saying in this hobby that has starting helping me keep my cool when trying to achieve a certain status with my tank, "Nothing good happens fast in an aquarium." Thus i am prepared to take the time to get it right. As far as the CO2, from my most recent readings, i have decided to put it off until i have achieved the balance needed for the plants to out compete the algae. The tank has no direct sun light where it sits in my apartment. The glass has needed to be scrubbed maybe once a week but the algae is also starting to cover my plants so they don't look like that nice pretty green they were when they were new. I can't believe i left the details of my fish out! derr! haha. Currently 5 black phantom tetras and 3 Julii corys. I have 3 more phantoms and one more cory that are in QT bc they are new and i do not want them to bring anything in the main tank. That was a problem once already and i learned my lesson.
JDM... I always forget is the flourish or excel the "Liquid co2"?
Byron...Previous lighting was a single t8, i actually had the same ZooMed FloraSun 5000k. Upgraded to add more plants that had higher light requirements. Have not added them at this time as i am trying to take things slower now. Water change is about once a week (25%) and tap water has small traces of ammonia and nitrates. You meantion Walstad a lot. What is the title of the book please?
The change from one T8 to two T5 HO was an increase in light intensity of roughly three times, so that is considerable. There is no doubt at all that this is the cause of the algae. Though I would still like to know which type. Any chance of a photo of some plants with this on the leaves?
Floating plants are good to help reduce the light intensity, along with lessening the duration. The aim is to find the balance.
Flourish Comprehensive Supplement is a nutrient supplement containing 14 of the 17 nutrients plants need (oxygen, hydrogen and carbon are not included). Flourish Excel is a liquid carbon supplement only, but I would not use it (in case you're thinking of doing so).
Walstad's main book is Ecology of the Planted Aquarium. It is quite technical in places...just so you know.;-)
I am in search of water lettuce at this time for a floating plant. Its root structure will be better for my tank and the breeding of my tetras in comparison to other popular floating plants.
test is in progress. I use all API liquid tests. will edit momentarily with results.
**results of tap water test**
I will have to look for that book. Thanks. "Quite technical" may be an understatement we learning to control parts of nature ;)
this is the best pic i could get as of now. this is the algae on the leaves of the anubias nana
To the ammnia and nitrate i the tap, these numbers are not too bad so they can be controlled. At the water change, a conditioner that detoxifies ammonia especially would be advisable, as this deals with the initial influx. By the time it wears off the plants and bacteria/archaea will handle it. More substantial water changes as suggested will deal with the nitrates better as it will reduce those occurring in the tank. Keeping nitrate below 10ppm is wise.
If/when i add more plants, would it be okay to start increasing light hours then or is it more about the intensity than the duration for plant growth?
Flourish...excel? comprehensive? ...
I use NutraFin Cycle and AquaPlus every water change. Are you suggesting using something other than those at the time of water change to help damper the harm ammonia can cause to fish?
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