Help, New Setup, Algae Issue

dutchtothetouch

New Member
Jun 2, 2019
16
5
3
20
Earth
Bad, Verybad Algae.
Im newbie please need help
Hello, I've recently started a planted tank, and now I'm having some issues, algae is running over my tank and I don't know what's causing this.
The tank has just been running for 2 weeks. 2 days ago I tried cleaning all the algae, and today they just come back and taking over my tank again.
Here are my water parameters
Ammonia : 0
Nitrite : 0
Nitrate : 25
GH :12.5
KH :5.5
PH : 6.8 (CO² on)
CO² : 3bps

I have 27watts of phillips LED and my tank is 17Litres.
Here are my dosing:
And I've been dosing since day 1

MACROs
12.78 ppm Potassium K (38.34ppm per week)

10ppm Nitrates NO³/ N (30ppm per week)

3ppm Phosphates PO⁴ / P (9ppm per week)

3ppm Magnesium Mg (9ppm per week)

MICROs

.16ppm Iron Fe (.48ppm per week)

I'm using a 27Watt LED and my PAR readings are 300 at surface Level

Weekly 50% water change

I'm wondering if my light is too high or my co2 is not sufficient?

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Last edited:

Robb

New Member
Apr 1, 2019
13
5
3
52
Staunton, Illinois
Hello,
What about your filtration? You didn’t mention type or size.

300 PAR is extremely high light to have at the surface. You might consider lowering that by as much as 1/3. You can do this by using a dimmer (if your light is compatible) or raising the light higher from the surface of the tank. Also, how long are the lights on? If more than 5-6 hours per day consider shortening.

One important factor is creating enough flow throughout the aquarium. The water needs to move around to get all the nutrients to your plants (including CO2). If the flow from your filter isn’t enough consider a power head. Flow rate in LPH should be 10x tank volume.

For CO2 injection are you using an in-tank diffuser? If so, consider positioning it in the outflow of your filter to increase the amount of CO2 that dissolves into the water. Are you using pressurized CO2 or DIY? If DIY try to make sure bubble rate is as consistent as possible. Consider purchasing a drop checker to make sure the plants are getting enough CO2.

More frequent water changes helps too when a tank is new. 50% at least 2x per week. I’ve even seen the following water change regimen. These would all be 50% water volume in tank.

Daily water changes for first week.
Every other day water changes week 2.
Change water 3x week 3.
Two changes week 4.
Week 5 and on once per week.

What kind of substrate are you using? Many release ammonia during the first few weeks and that is why those water changes are so important. As the biofiltration becomes established in your tank and filter you’ll be able to decrease the frequency of the water changes.

I know this is a lot. Here’s a simple recap:

1. Lower light intensity.
2. Lights on for no more than 6 hours per day.
3. Adequate filtration with high enough flow.
4. Increase frequency of water changes (and when you do changes try to remove as much organic debris as possible from substrate). Remove as much algae as possible during water changes.
5. Position CO2 diffuser for optimal dissolution.

I hope this helps and that others chime in as well.
 

dutchtothetouch

New Member
Jun 2, 2019
16
5
3
20
Earth
Hello,
What about your filtration? You didn’t mention type or size.

300 PAR is extremely high light to have at the surface. You might consider lowering that by as much as 1/3. You can do this by using a dimmer (if your light is compatible) or raising the light higher from the surface of the tank. Also, how long are the lights on? If more than 5-6 hours per day consider shortening.

One important factor is creating enough flow throughout the aquarium. The water needs to move around to get all the nutrients to your plants (including CO2). If the flow from your filter isn’t enough consider a power head. Flow rate in LPH should be 10x tank volume.

For CO2 injection are you using an in-tank diffuser? If so, consider positioning it in the outflow of your filter to increase the amount of CO2 that dissolves into the water. Are you using pressurized CO2 or DIY? If DIY try to make sure bubble rate is as consistent as possible. Consider purchasing a drop checker to make sure the plants are getting enough CO2.

More frequent water changes helps too when a tank is new. 50% at least 2x per week. I’ve even seen the following water change regimen. These would all be 50% water volume in tank.

Daily water changes for first week.
Every other day water changes week 2.
Change water 3x week 3.
Two changes week 4.
Week 5 and on once per week.

What kind of substrate are you using? Many release ammonia during the first few weeks and that is why those water changes are so important. As the biofiltration becomes established in your tank and filter you’ll be able to decrease the frequency of the water changes.

I know this is a lot. Here’s a simple recap:

1. Lower light intensity.
2. Lights on for no more than 6 hours per day.
3. Adequate filtration with high enough flow.
4. Increase frequency of water changes (and when you do changes try to remove as much organic debris as possible from substrate). Remove as much algae as possible during water changes.
5. Position CO2 diffuser for optimal dissolution.

I hope this helps and that others chime in as well.

Hey! thanks for the feedback, I'm currently using the Eheim classic series (600) which is about 600l of water flow /hour? is that too much? or?

In the past I've used this filter for my larger 60cm tank, and It was already a matured tank, So I just moved the filter to this nano tank, And didin't do too long of a nitrogen cycle. But it seemed like algae issue still appeared.

Since last week, I've been doing >50% water change every other day, And it's been helping alot.
I've also changed my bulb to a 14watt LED and now my PAR reads at 100, 130 if I lower the lights at surface level.

For CO² I've increased it to 4bps, I don't worry too much for co2 poisoning since I don't have much fish. And it seems to be getting better.

As for my dosing, I've not changed my dosing at all, do you think I should decrease or increase it?

For my substrate I'm using a local brand that's similiar to ADA amazonia.

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Robb

New Member
Apr 1, 2019
13
5
3
52
Staunton, Illinois
Hey! thanks for the feedback, I'm currently using the Eheim classic series (600) which is about 600l of water flow /hour? is that too much? or?

That a lot of filtration for such a small tank, but hey, I always say more is better with filtration!

In the past I've used this filter for my larger 60cm tank, and It was already a matured tank, So I just moved the filter to this nano tank, And didin't do too long of a nitrogen cycle. But it seemed like algae issue still appeared.

Algae appears when things get out of balance. They are very opportunistic species and will take any advantage when given. Also there’s a lot of biofiltration going on in the tank, not just the filter, so just because you transfer a filter that’s already been in use to a new tank doesn’t mean the new one will be algae free.

Since last week, I've been doing >50% water change every other day, And it's been helping alot.
I've also changed my bulb to a 14watt LED and now my PAR reads at 100, 130 if I lower the lights at surface level.

Yes! Keep up those more frequent water changes. Are your lights DIY? Looks like they’re doing a nice job of growing the plants. I think 100 PAR is plenty, but that’s just me. I am curious how you’re measuring PAR?

For CO² I've increased it to 4bps, I don't worry too much for co2 poisoning since I don't have much fish. And it seems to be getting better.

Cool!

As for my dosing, I've not changed my dosing at all, do you think I should decrease or increase it?

Are you using the EI method (sorry don’t remember if you mentioned this in your original post)? I am a fan of leaner dosing methods, that’s why I use PPS-PRO. I dose daily. I like this because it gets me looking at the tank daily, I can do small bits of maintenance between my larger weekly water changes, and I enjoy it! I also think it gives me more control over PPM levels.

For my substrate I'm using a local brand that's similiar to ADA amazonia.

Your tank is looking much better! You’ve changed light levels and are doing more frequent water changes. You’re seeing positive results. I wouldn’t change anything else for now. If after another week or so you still have some algae, perhaps you can consider changing something with the fertilizers while keep the other things the same.

Good luck!
 

dutchtothetouch

New Member
Jun 2, 2019
16
5
3
20
Earth

Thanks!

I'm using the Phillips LED light bulb and
I measure my par using lux meter on my phone and then I divide the result with the constant of 67, but I think it only works for white lights.
I know this isn't the best way to measure par but I could at least have a general measurement on my light, it's better than having no measurement at all right?

Also about my Dosing, Yes , I do EI dosing to my tank, I was considering to dose lean like what Dennis Wong doses but I was scared that the plants wouldn't get enough nutrients, so I did EI instead.

Algae still comes at moderate amount every three days and Im considering to start dosing leaner, but have some questions atm.
would my plants go to some kind of transition if I change my dosing? or should I just go for it?
 

Tom Barr

Founder
Staff member
Administrator
Jan 23, 2005
18,696
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Clean that diffuser and make sure to add enough CO2. Add some shrimps.
 

Gabe Hayes

New Member
Jul 10, 2019
22
3
3
Long Beach, CA
Hey! thanks for the feedback, I'm currently using the Eheim classic series (600) which is about 600l of water flow /hour? is that too much? or?

In the past I've used this filter for my larger 60cm tank, and It was already a matured tank, So I just moved the filter to this nano tank, And didin't do too long of a nitrogen cycle. But it seemed like algae issue still appeared.

Since last week, I've been doing >50% water change every other day, And it's been helping alot.
I've also changed my bulb to a 14watt LED and now my PAR reads at 100, 130 if I lower the lights at surface level.

For CO² I've increased it to 4bps, I don't worry too much for co2 poisoning since I don't have much fish. And it seems to be getting better.

As for my dosing, I've not changed my dosing at all, do you think I should decrease or increase it?

For my substrate I'm using a local brand that's similiar to ADA amazonia.

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Looking much better