Plywood/ Glass Tank

boozzbro

Member
What type of epoxy paint do i need to use. I was about to get a marine grade one but i say that it was copper based which woudlnt be good for keeping anything except for fish with. Would a normal pool coating expoy work?
 

cgrant

Active Member
what exactly are you planning on painting?
whatever you do dont paint the inside of the tank, just the outside!
I take it you want to paint the back of the tank?
The stand you would paint or stain, stain you just brush it on then wipe it off.
Painting the stand you want to prime it them paint.
Really need more info on what exactly you are planning on painting.
 

windmill

Member
I've always been curious about those kinds of tanks myself. Are you supposed to leave the inside wood exposed to saltwater!? That doesn't seem safe.
 

scsinet

Active Member
When you build a tank out of plywood and glass, you DON'T leave the plywood exposed to water... Booze is talking about what to do to waterproof the wood on the inside.
I've never actually seen this done, but it's either a marine epoxy that is used to give boat hulls that plastic-like coating, or it's fiberglass.
Personally, I can see the fiberglass working well for this... if I remember correctly, you paint the inside, then lay pieces of fiberglass cloth on the wet paint, then paint again over that, leaving you a seamless, incredibly strong, waterproof and completely saltwater safe/impervious surface.
 

scsinet

Active Member
When you build a tank out of plywood and glass, you DON'T leave the plywood exposed to water... Booze is talking about what to do to waterproof the wood on the inside.
I've never actually seen this done, but it's either a marine epoxy that is used to give boat hulls that plastic-like coating, or it's fiberglass.
Personally, I can see the fiberglass working well for this... if I remember correctly, you paint the inside, then lay pieces of fiberglass cloth on the wet paint, then paint again over that, leaving you a seamless, incredibly strong, waterproof and completely saltwater safe/impervious surface.
It all comes as one big kit.
 

boozzbro

Member
yea thats what i was talking about. The real question i have is would the pool coatings suffice or would the chlordes in the saltwater (from the NaCl) be worse than the free chlorine you put into the pool.
Either way you end up with a hard plastic-like finish on the wood that is waterproof. then use silicone caulking to attach the glass to the coated wood.
 

fishrule

Member
Hey,
Go to Google and type this in the search field: Plywood-Glass Tank

I found tons of sites with DIY Plywood-Glass Tanks and they are all made with different liners/coatings for the inside of the tank.
Good Luck and please update us with pictures and your progress... ***)
 

xdave

Active Member
Like SCSInet said, marine epoxy is what you need to actually paint the inside. Doing the inside with fiberglass works good and I'm pretty sure you can paint right over that with the epoxy.
Check out the G.A.R.F. site. On the left go to DIY. GARF It has a calculator for thickness and instructions.
 

fish-man-t

Member
y dont you just marsite it? like pools are 1 part whit cement and 2 parts crushed marble + its strong as hell at 1 inch
 

psusocr1

Active Member
im building my 550 out of plywood and glass,, i have all the materials so if you want to know how to do it justs hoot me an email
 

ghiggi

Member
From the GARF DIY Plywood tank page:
The only sealer/coating that is qualified for use in an aquarium is a TWO PART EPOXY FOR POTABLE WATER TANKS. This coating is used to seal the ******** of several thousand gallon community drinking water tanks, as a coating for holding tanks in fish farms and as a liner for large public aquariums. These coatings are NSF 61/USDA/ANSI/AWWA and FDA certified and approved. Further, epoxy coatings are highly resistant to salts and corrosion and are recommended for marine use.
Some brand name coatings that can be used are:

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sherwin williams brand "Epoxide HS Tank Lining"

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rustoleum brand "9200" system epoxy with color choices one of which is "9271" dunes tan

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These epoxies contain no solvents or volatile organic compounds and are usually composed of 100% solids. Additionally, solvents and thinners are not recommended for use with this epoxy because they would defeat the purpose of using a non-toxic coating. There are other manufacturers of epoxy and many of them have nsf 61 approved epoxy for potable water. Further, if one finds an epoxy that is not recommended for use with potable water, not nsf 61 certified, I suggest against using it.
Hope this helps.
 

boozzbro

Member
the problem with those products is they are both "industrial grade" items. That means unless you buy in bulk you will pay out the wazoo for them. The best way i could get those would be to get leftover after a job. But we dont have an other plant with its own potable water tank going in for at least 2 years.
 

fishrule

Member
Originally Posted by boozzbro
the problem with those products is they are both "industrial grade" items. That means unless you buy in bulk you will pay out the wazoo for them. The best way i could get those would be to get leftover after a job. But we dont have an other plant with its own potable water tank going in for at least 2 years.
Do you have a local Pool and Spa company near you? You can ask them what they would use and see if you can buy a little off of them.
Plus they might have some cool new product they are using that they have a little extra of. That or see if they can order a little extra on the side with their next bulk order...
 

boozzbro

Member
thats why i was asking if you could use the pool epoxy coating. If you can that is great. But what i dont know is if the pool epoxies are capable of dealing with salt water. The generally arent marine rated.
 

mbrennan

Member
I've built large holding tanks 4' X 4' X 8' with fiberglass and marine epoxies like West, System 3 and MAS, with excellent results. Using the epoxy as not only a coating but the glue and filleting compound between joints. It is very similar to building wooden boats using epoxy only much simpler (Not many complex angles or curves).
 

phixer

Active Member
I used marine epoxy from a boat shop. Light blue in color. Some guys will line the plywood with fiberglass. Its messy but when the resin dries it makes a very rigid tank.
 
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