My Plan to Get Rid of Algae

[Loachie]

I've kept freshwater fish for several years, but I've only just started trying to keep plants. I got hooked when I tried a 5 gallon tank with a big baby tears plant, some ghost and cherry shrimp, and four small fish. It looked great, so I decided to add plants to my 29 gallon tank. It was wonderful for about 3 weeks, but now there's an algae explosion! I have hair algae, black slime algae, green slime algae, and a reddish brown stuff that's really difficult to scrub off the glass. My fish love the extra food, but it's time for it to go. So, I read a book on aquarium plants, and I've come up with a plan. I'd really like to hear what you guys think before I try this, since I'm very new to keeping plants and this will be a lot of work.

Here's what I'm thinking:

1) Get the plants healthier, in general, so they out-compete the algae and use up all the nutrients. To do this, I'm planning to install a substrate heater, add a thin layer of Eco-Complete substrate instead of using liquid fertilizer, add a little laterite, use a finer substrate to allow better rooting, remove the plants that require high light, and replace them with moderate to low light plants. (I have a 65 Watt compact florescent setup for a 29 gallon tank).

2) Get rid of excess phosphates, using PhosRid.

3) Add lots of algae-eating shrimp. (I hope my fish won't just eat these guys. I'm planning on adding cherry shrimp to a tank with glass cats, a cory cat, cardinal tetras, a small rainbowfish, and two weather loaches. I may remove the loaches, first.)

4) Interrupt photosynthesis. I've read that getting an automatic timer and turning off the aquarium light for 2 hours in the middle of the day, each day, interrupts algae photosynthesis without harming the plants.

... so... What do you think? Will this do it? Any other ideas?

[neilanh]

First, can we get some more details on your tank? If we can isolate what the problem is we can correct then, then if you still wish to make these upgrades we can go forward.

You have 65W PC on your 29 gallon tank. What kelvin is the bulb you're running?

What type of substrate do you currently have?

What liquid fertilizers and how much are you using?

My initial response, without the above info, would be:
1) Not a bad idea, but don't use eco and laterite, there's no need. Also, the use of Eco doesn't wholly remove the requirement to dose ferts. Also, you need to consider injecting CO2 with the lighting level you're at. This will help the plants to use more nutrients.

2) Unless you have high phosphates in your source water, just do PWCs to get your phosphate levels down. What are you using to determine they're high?

3) Nothing wrong with adding shrimp, lots of us have whole tanks with nothing but shrimp in them. I can't comment to their compatability with your current inhabitants, however.

4) There's differences of opinions on the split photo-period. I've never used it, but not everyone agrees it's beneficial.

Most likely your issue is that you're dosing too much fertilizer, you have too much light, and no CO2. This is what's causing the explosion of algae that you're dealing with.

[Purrbox]

I'd say that the root of the problem is probably a nutrient imbalance. The steps you've outlined will do little to address this issue.

There's little to no evidence that high phosphates causes any type of algae. In fact Green Spot Algae indicates that you need to increase dosing phosphates. To cast phosphates as a villian that needs to be removed could in fact make your algae issues worse.

As Neilhan has mentioned, there's no need to use both Eco Complete and Laterite. Laterite is meant to supplement substrates that don't hold nutrients, such as gravel or sand. Since Eco Complete comes already storing lots of nutrients and can absorb more readily to be released to the plants as needed. Laterite can cause water issues if accidently exposed to the water column, so care should be taken when using it. It definately isn't ideal for someone that likes to rearrange their plants frequently.

Algae eating fish or inverts are good at keeping normal levels of algae unnoticable, but they can't make up for an out of balance aquarium with rampant algae.

The general consensus is that the siesta in the lighting realy does little to help with algae issues. You're probably better off cutting back on your photoperiod, than you are at introducing a seista.

While some still swear by substrate heaters, most find them to be an unnecessary and expensive peice of equipment. Your money would most likely be better spent elsewhere.

It would definately be helpful to have more details about the care and maintenance of your aquarium.

Lighting - How old are the bulbs and kelvin rating. How long do you keep your lights on each day? Are they on a timer?
Carbon - Are you injecting CO2 or dosing Flourish Excel? How much surface turbulance is there? What type of filter are you using? Do you have air stones?
Nutrients - What are you dosing, how much, and how often?
Water Parameters - What are the test results for Nitrate, Phosphate, pH, and KH?
Plants - What plants and how many of each do you have? It may be that introducing some moderate light fast growing stem plants will go a long way to getting things under control.

[pitt420dude]

To echo some of what has been said, I too think the substrate heater is unecessary. More often than not, algae is a result of a nutrient deficiency, not excess, so I'd wager that the main culprit is the lack of CO2.

This is a fantastic source of all kinds of info about algae. GWAPA: It's stolen from Neilanh's sig, lol. It helped me learn a lot when I got BBA.

[Loachie]

Thanks for all the advice. Like I mentioned before, I'm completely new to planted aquariums, and I'm a little stunned by all the info out there. Anyway, here are the stats on my tank:

29 gallons

Temperature: 78 F

Kh: approx. 54 ppm

Phosphates: 0.15 ppm

Iron: Test kit says none.

Ammonia: Test says none.

Nitrate: 1 ppm

Substrate: aquarium gravel of various sizes

Ph: Currently 7.6 (I try to keep it around 7.2, but it stabilizes at 8.0 if left alone, and I try not to change it more than 0.2 during any one water change, so it can take weeks to lower it significantly.)

Fish: 2 weather loaches, 1 cory cat, 1 zebra botia, 1 rainbow fish, 3 glass cats, and a declining # of cardinal tetras, currently 2. All my fish are healthy and well-established, except the tetras. They survive only 2 - 3 weeks in my tank, and I can't figure out why. Currently on my 3rd batch.

Plants: 5 Amazon swords, 1 small java fern, 2 anubias v. nana, 1 unknown plant (probably anubias), 2 dwarf baby tears (one on a small piece of wood), 1 wisteria, 1 banana plant.

Algae: Brown and green smears on glass, black film on leaves and substrate (when I rub the wisteria leaves, a perfect black replica of the leaf slides off, made of algae), hair algae. No sign of green water. The banana plant is the only thing in the tank with no algae.

Lighting: 65 Watt compact florescent 6700 K

Filtration: Bio Wheel Penguin 150 (150 gph) and 1 submersible power head (75 gph) set for surface agitation. The bio wheel broke and it took me a week to replace it, so there was one week when there was no mechanical filtration. Oxygen levels seemed ok from surface agitation, as fish appeared healthy - not gulping at surface, at all.

Here's my aquarium 3 weeks ago:



Here's my aquarium today :

[Loachie]

One more note: I've been using Sera Florena Iron & Minerals for All Plants, although my iron levels don't stay up for long. Contains iron chloride, sodium chloride, magnesium chloride, sodium bicarbonate, sulphuric acid, and tetra-acetate of ethylene diamene. Other than that, I use Ph Down and API Water Conditioner to prepare my tap water, which has a natural Ph of 8.0

[Purrbox]

First off there's absolutely no need to adjust your pH. A stable pH is much more important than a specific pH. Trying to adjust your pH can cause other problems depending on what chemicals it contains.

Don't bother with the iron test kit, the hobby grade ones aren't accurate enough for our use.

I know nothing about the particular fertilizer that you're using, but it appears to only be supplying trace nutrients. Based on your test results and lack of macro dosing, your algae problems are largely due to nutrients bottoming out. You'll need to start dosing Nitrates, Phosphates, and Potassium. The most cost effective method is to use dry ferts (KNO3, KH2PO4, & K2SO4). I'd also recommend switching to one of the Trace ferts that is highly recommended among experianced planted aquarium keepers (Flourish "Comprehensive", Tropica Plant Nutrition, or CSM+B). You'll want to bump your PO4 to 1-2ppm and your Nitrates to 10-20ppm. For Potassium, you'll want to dose 10-20ppm per week.

You may also find it helpful to get ahold of some additional fast growing stem plants while getting the aquarium stabilized. Rotala rotundifolia (often mislabeled Rotala indica) is a good choice. Some of the Ludwigias would probably work well too. I'm sure others can recommend other good choices. You could just pick up some more of the Wisteria if you'd like.

It also appears that some of your plants may not be true aquatics. From the pictures it appears that a couple of your plants are green with white stripes, this is a good indicator of a non aquatic.

[Loachie]

Pitt420Dude, thanks so much for the link! Great info and pictures! I definitely have a blue-green algae problem. According to the website, I should increase my nitrates. Anyone know how to do this? What would cause low nitrate levels?

Also, what's a good fertilizer?

Thanks again!

[Loachie]

Purrbox, thanks for the response - I think that's probably exactly the info I needed. Please disregard the questions in my last post - I wrote it before seeing your last post. I will definitely try those fertilizers.

As for the striped plant, it's supposed to be a color mutation of the Amazon sword - at least, that's what the LFS said. I really like it - is it necessary to take it out? Believe it or not, it seems healthy, under all that algae. I really don't know why my plants haven't died, yet, but they're still green under all the muck.

[rich311k]

Great advice here. Just one more thought. Clean as much of that stuff out as you can and rinse your filter pads out well. I could never win either until I got much more serious about keeping the filter pads rinsed out.