Mitch_ScruffyCityAquatics Posted October 10, 2022 Share Posted October 10, 2022 I have a bunch of river rock that I want to stack up (only three high at the highest point). They are large rocks. Like 8” across on some of them. I have a Marineland 75 gallon from Petsmart… Do you think it’s too much weight to have 12 or so of these? Specifically if I stack most of them up on one side. There is gravel substrate that the rocks will be sitting in. Link to comment Share on other sites More sharing options...
DiscusLover Posted October 10, 2022 Share Posted October 10, 2022 On 10/10/2022 at 10:07 AM, Mitch_ScruffyCityAquatics said: I have a bunch of river rock that I want to stack up (only three high at the highest point). They are large rocks. Like 8” across on some of them. I have a Marineland 75 gallon from Petsmart… Do you think it’s too much weight to have 12 or so of these? Specifically if I stack most of them up on one side. There is gravel substrate that the rocks will be sitting in. It should be fine in my opinion. 1 Link to comment Share on other sites More sharing options...
OceanTruth Posted October 10, 2022 Share Posted October 10, 2022 I’m no expert, but I wouldn’t worry about it. It’s not an apples to apples comparison, but I once saw an aquascaper use a single 50lbs rock in a rimless nano tank long ago. I thought he was a mad man, but he had the tank running for a long time and it actually looked beautiful. I never would have believed the tank could support that weight let alone have space for substrate, plants and some nano fish. 1 Link to comment Share on other sites More sharing options...
Scapexghost Posted October 10, 2022 Share Posted October 10, 2022 Look at some aquascaped tanks. They're like 75% hardscape. I wouldnt worry. 1 Link to comment Share on other sites More sharing options...
Mitch_ScruffyCityAquatics Posted October 10, 2022 Author Share Posted October 10, 2022 On 10/10/2022 at 2:07 PM, Scapexghost said: Look at some aquascaped tanks. They're like 75% hardscape. I wouldnt worry. That’s what I keep telling myself! Link to comment Share on other sites More sharing options...
Flumpweesel Posted October 10, 2022 Share Posted October 10, 2022 Just be careful with the stack large rocks can do damage if they fall. I had bulldozer goldfish that would knock pebbles the size of coke cans over. I made sure they could hit the walls of the tank. Gravel would protect the base. Link to comment Share on other sites More sharing options...
Patrick_G Posted October 10, 2022 Share Posted October 10, 2022 You could try using a plastic light diffuser to spread out the load. I’ve seen that in lots of YouTube aquascapes. In my 75 I used some closed cell foam padding under the base rocks. I’m not sure if it’s necessary but it made me feel better. 1 Link to comment Share on other sites More sharing options...
BlueLineAquaticsSC Posted October 10, 2022 Share Posted October 10, 2022 I’ve used plastic light diffusers when I do really heavy rocks (like 30+lbs) they disperse the weight and also create a barrier between the rock and glass. With rounded river rocks it shouldn’t be a problem but more jagged rocks can have sharp points and if they settle the wrong way, to much weight behind a small point (psi) will break the glass. 2 Link to comment Share on other sites More sharing options...
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