HDPE good or bad?

[Teemingtank]

I’ve been using a big 22 gallon port-a-long to store my R/O water. I know these aren’t safe for potable water due to leeching if left in direct sunlight. I can’t really find any research on hdpe’s effect on fish or water chemistry. I’ve been battling dino’s and I’m trying to cover all my bases in determining the root cause

 

[Peace River]

I’ve been using a big 22 gallon port-a-long to store my R/O water. I know these aren’t safe for potable water due to leeching if left in direct sunlight. I can’t really find any research on hdpe’s effect on fish or water chemistry. I’ve been battling dino’s and I’m trying to cover all my bases in determining the root cause

Although there may be some variation in plastic containers, HDPE containers (they will have a recycle #2 symbol) are generally considered food safe (which also means aquarium water safe). Good luck!

 

[High ICP]

Im interested is know if you find the root cause

What will you do about it?

I guess I can be sarcastic and say that starting a reef tank is the root cause of getting dinos. Or diatoms or cyano.

Every salt water tank I have had gets this stuff. And every tank it goes away. I pretty much consider it to be part of the cycling process.

Milk jigs are HDPE. Starboard is HDPE and people put that in tank bottoms regularly. Potable water storage is often HDPE.

 

[Bpainter3]

For the Dino If you have a sump use a hose to suck it all off the rock through a sock into the sump. Then dose Hydrogen peroxide 1mL per 10 gallons dosed at night For a few weeks at least. Of that fails do a black out for a week minimum and dose hydrogen peroxide as well

 

[Teemingtank]

Im interested is know if you find the root cause

What will you do about it?

I guess I can be sarcastic and say that starting a reef tank is the root cause of getting dinos. Or diatoms or cyano.

Every salt water tank I have had gets this stuff. And every tank it goes away. I pretty much consider it to be part of the cycling process.

Milk jigs are HDPE. Starboard is HDPE and people put that in tank bottoms regularly. Potable water storage is often HDPE.

I bring up the hdpe because the slightest amount of heat or sunlight can leech hdpe into water. If you were to drink water from an hdpe container that was exposed to a decent amount of heat or sunlight you’d definitely feel a little sick. I imagine hdpe has different variations, but my jug specifically says not intended for potable water, I figured if I kept it away from heat or light it would be suitable for fish. I’ve been battling Dino for a couple months and it’s aggressive. To answer your question “what will I do about it?”, everything in my power to stop feeding this Dino bloom. I’ve dove into just about every thread on here regarding Dino’s and I’m trying to pull as much info as I can and apply it to my own tank

 

[Teemingtank]

For the Dino If you have a sump use a hose to suck it all off the rock through a sock into the sump. Then dose Hydrogen peroxide 1mL per 10 gallons dosed at night For a few weeks at least. Of that fails do a black out for a week minimum and dose hydrogen peroxide as well

I’ve been bastering daily and doing exactly that, rinsing socks daily with r/o, replacing every 3 days. What’s you experience with hydrogen peroxide and photosynthetic organisms like anemones? I tried it and thought it was having an adverse effect on my nems, but that also could have been from toxic die off of the Dino’s. I also have 2 9w uv sterilizers, which I don’t think are quite powerful to put a dent in anything.

 

[Teemingtank]

Although there may be some variation in plastic containers, HDPE containers (they will have a recycle #2 symbol) are generally considered food safe (which also means aquarium water safe). Good luck!

Thank you!!

 

[Bpainter3]

I’ve been bastering daily and doing exactly that, rinsing socks daily with r/o, replacing every 3 days. What’s you experience with hydrogen peroxide and photosynthetic organisms like anemones? I tried it and thought it was having an adverse effect on my nems, but that also could have been from toxic die off of the Dino’s. I also have 2 9w uv sterilizers, which I don’t think are quite powerful to put a dent in anything.

I have never had h2o2 affect anything in my experience. You really need to bleach the socks don’t know if ro water is enough. Take a hose and suck out every little bit you can through that sock into the sump so your not changing water. Do not change water until the Dino’s are gone for a week as the Dino’s feed on silica and every time you change water they with thrive again

 

[Teemingtank]

I have never had h2o2 affect anything in my experience. You really need to bleach the socks don’t know if ro water is enough. Take a hose and suck out every little bit you can through that sock into the sump so your not changing water. Do not change water until the Dino’s are gone for a week as the Dino’s feed on silica and every time you change water they with thrive again

I’m going to put this to use! Cleaning bleach or regular strength bleach?

 

[Lukas75]

I bring up the hdpe because the slightest amount of heat or sunlight can leech hdpe into water. If you were to drink water from an hdpe container that was exposed to a decent amount of heat or sunlight you’d definitely feel a little sick. I imagine hdpe has different variations, but my jug specifically says not intended for potable water, I figured if I kept it away from heat or light it would be suitable for fish. I’ve been battling Dino for a couple months and it’s aggressive. To answer your question “what will I do about it?”, everything in my power to stop feeding this Dino bloom. I’ve dove into just about every thread on here regarding Dino’s and I’m trying to pull as much info as I can and apply it to my own tank

I'm just going to be honest and say that as a rule of thumb (for me) if it isn't potable water safe I would not risk using it for my aquarium. RODI water wants to pick up anything it can and I would not trust it not to pull something out of that container that is making it non-potable water safe. That having been said unless there is something else in the plastic that I would suspect of causing an algae issue. That isn't to say that there is something else not listed below in that specific containers manufacturing.

https://www.britannica.com/science/high-density-polyethylene

 

[Lukas75]

As a side note, all my tanks have a starboard bottom and I've had cyano and diatoms, but no dinos.

 

[Teemingtank]

I'm just going to be honest and say that as a rule of thumb (for me) if it isn't potable water safe I would not risk using it for my aquarium. RODI water wants to pick up anything it can and I would not trust it not to pull something out of that container that is making it non-potable water safe. That having been said unless there is something else in the plastic that I would suspect of causing an algae issue. That isn't to say that there is something else not listed below in that specific containers manufacturing.

https://www.britannica.com/science/high-density-polyethylene

This is the exact model I bought brand new. I have considered that the label “not intended for potable water”, could be due to the fact that most people use these for gray water when camping... they probably don’t want anybody to take a big gulp of dirty sink water lol. Correct me if I’m wrong, from my research dinos aren’t exactly part of a normal tank cycle, it has to be introduced, most threads I’ve read confirm this.

 

[Teemingtank]

As a side note, all my tanks have a starboard bottom and I've had cyano and diatoms, but no dinos.

I hope you never get them either. There is no bigger bummer than having to extensively clean your tank every day just to enjoy your fish. The stuff is ugly, when it dies it stinks like the tide went out, and it re-covers your aquarium within hours. Evil little buggers

 

[Lukas75]

This is the exact model I bought brand new. I have considered that the label “not intended for potable water”, could be due to the fact that most people use these for gray water when camping... they probably don’t want anybody to take a big gulp of dirty sink water lol. Correct me if I’m wrong, from my research dinos aren’t exactly part of a normal tank cycle, it has to be introduced, most threads I’ve read confirm this.

My understanding of dinos is the same. Diatoms are a regular part of the cycle as the extra silicates are consumed, but not dinos. Best of luck in dealing with them!

 

[Teemingtank]

trying to avoid noob mistakes. Like the time I trusted Walmart r/o water, just to tds it and find out it was 150+!

My understanding of dinos is the same. Diatoms are a regular part of the cycle as the extra silicates are consumed, but not dinos. Best of luck in dealing with them!

thank you! I’m gonna get after em:mad: good luck with your tanks as well!!!

 

[Teemingtank]

From my sump today ;Yuck